Conditionally declare and define variable that is unused in LITE mode (#9854 )

Summary: Context: As mentioned in https://github.com/facebook/rocksdb/issues/9701, we have the following in LITE=1 make static_lib for v7.0.2 ``` CC file/sequence_file_reader.o CC file/sst_file_manager_impl.o CC file/writable_file_writer.o In file included from file/writable_file_writer.cc:10: ./file/writable_file_writer.h:163:15: error: private field 'temperature_' is not used [-Werror,-Wunused-private-field] Temperature temperature_; ^ 1 error generated. make: *** [file/writable_file_writer.o] Error 1 ``` as titled Pull Request resolved: https://github.com/facebook/rocksdb/pull/9854 Test Plan: - Local `LITE=1 make static_lib` reveals the same error and error is gone after this fix - CI Reviewed By: ajkr, jay-zhuang Differential Revision: D35706585 Pulled By: hx235 fbshipit-source-id: 7743310298231ad6866304ffa2225c8abdc91d9a
Retrieve ZLib from the archive (#9783 )
2026-11-06 19:12:36 -05:00 · 2022-04-19 12:00:09 -07:00 · 2022-04-04 18:08:36 -07:00 · 2022-03-29 12:53:45 -07:00 · 2022-03-29 12:50:05 -07:00 · 2022-03-29 12:48:08 -07:00
323 changed files with 4952 additions and 24291 deletions
@@ -87,6 +87,7 @@ commands:
      - run:
          name: Install Clang 13
          command: |
+            wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
            echo "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-13 main" | sudo tee -a /etc/apt/sources.list
            echo "deb-src http://apt.llvm.org/focal/ llvm-toolchain-focal-13 main" | sudo tee -a /etc/apt/sources.list
            echo "APT::Acquire::Retries \"10\";" | sudo tee -a /etc/apt/apt.conf.d/80-retries # llvm.org unreliable
@@ -102,16 +103,10 @@ commands:

  install-benchmark:
    steps:
-      - run:
-          name: Install ninja build
-          command: sudo apt-get update -y && sudo apt-get install -y ninja-build
      - run:
          name: Install benchmark
          command: |
-            git clone --depth 1 --branch v1.6.1 https://github.com/google/benchmark.git ~/benchmark
-            cd ~/benchmark && mkdir build && cd build
-            cmake .. -GNinja -DCMAKE_BUILD_TYPE=Release -DBENCHMARK_ENABLE_GTEST_TESTS=0
-            ninja && sudo ninja install
+            sudo apt-get update -y && sudo apt-get install -y libbenchmark-dev

  upgrade-cmake:
    steps:
@@ -176,42 +171,19 @@ jobs:
      - increase-max-open-files-on-macos
      - install-gflags-on-macos
      - pre-steps-macos
-      - run: ulimit -S -n 1048576 && OPT=-DCIRCLECI make V=1 J=32 -j32 all
+      - run: ulimit -S -n 1048576 && OPT=-DCIRCLECI make V=1 J=32 -j32 check
      - post-steps

  build-macos-cmake:
    macos:
      xcode: 12.5.1
    resource_class: large
-    parameters:
-      run_even_tests:
-        description: run even or odd tests, used to split tests to 2 groups
-        type: boolean
-        default: true
    steps:
      - increase-max-open-files-on-macos
      - install-cmake-on-macos
      - install-gflags-on-macos
      - pre-steps-macos
-      - run:
-          name: "cmake generate project file"
-          command: ulimit -S -n 1048576 && mkdir build && cd build && cmake -DWITH_GFLAGS=1 ..
-      - run:
-          name: "Build tests"
-          command: cd build && make V=1 -j32
-      - when:
-          condition: << parameters.run_even_tests >>
-          steps:
-            - run:
-                name: "Run even tests"
-                command: ulimit -S -n 1048576 && cd build && ctest -j32 -I 0,,2
-      - when:
-          condition:
-            not: << parameters.run_even_tests >>
-          steps:
-            - run:
-                name: "Run odd tests"
-                command: ulimit -S -n 1048576 && cd build && ctest -j32 -I 1,,2
+      - run: ulimit -S -n 1048576 && (mkdir build && cd build && cmake -DWITH_GFLAGS=1 .. && make V=1 -j32 && ctest -j10)
      - post-steps

  build-linux:
@@ -247,38 +219,38 @@ jobs:
  build-linux-release:
    machine:
      image: ubuntu-2004:202111-02
-    resource_class: 2xlarge
+    resource_class: large
    steps:
      - checkout # check out the code in the project directory
-      - run: make V=1 -j32 release
+      - run: make V=1 -j8 release
      - run: if ./db_stress --version; then false; else true; fi # ensure without gflags
      - install-gflags
-      - run: make V=1 -j32 release
+      - run: make V=1 -j8 release
      - run: ./db_stress --version # ensure with gflags
      - post-steps

  build-linux-release-rtti:
    machine:
      image: ubuntu-2004:202111-02
-    resource_class: xlarge
+    resource_class: large
    steps:
      - checkout # check out the code in the project directory
      - run: make clean
-      - run: USE_RTTI=1 DEBUG_LEVEL=0 make V=1 -j16 static_lib tools db_bench
+      - run: USE_RTTI=1 DEBUG_LEVEL=0 make V=1 -j8 static_lib tools db_bench
      - run: if ./db_stress --version; then false; else true; fi # ensure without gflags
      - run: sudo apt-get update -y && sudo apt-get install -y libgflags-dev
      - run: make clean
-      - run: USE_RTTI=1 DEBUG_LEVEL=0 make V=1 -j16 static_lib tools db_bench
+      - run: USE_RTTI=1 DEBUG_LEVEL=0 make V=1 -j8 static_lib tools db_bench
      - run: ./db_stress --version # ensure with gflags

  build-linux-lite:
    machine:
      image: ubuntu-2004:202111-02
-    resource_class: large
+    resource_class: 2xlarge
    steps:
      - pre-steps
      - install-gflags
-      - run: LITE=1 make V=1 J=8 -j8 check
+      - run: LITE=1 make V=1 J=32 -j32 check
      - post-steps

  build-linux-lite-release:
@@ -312,37 +284,18 @@ jobs:
      - pre-steps
      - install-gflags
      - install-clang-10
-      - run: ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 CC=clang-10 CXX=clang++-10 ROCKSDB_DISABLE_ALIGNED_NEW=1 USE_CLANG=1 make V=1 -j32 check # aligned new doesn't work for reason we haven't figured out
+      - run: COMPILE_WITH_ASAN=1 CC=clang-10 CXX=clang++-10 ROCKSDB_DISABLE_ALIGNED_NEW=1 USE_CLANG=1 make V=1 -j32 check # aligned new doesn't work for reason we haven't figured out
      - post-steps

  build-linux-clang10-mini-tsan:
    machine:
      image: ubuntu-2004:202111-02
    resource_class: 2xlarge
-    # find test list by `make list_all_tests`
-    parameters:
-      start_test:
-        default: ""
-        type: string
-      end_test:
-        default: ""
-        type: string
    steps:
      - pre-steps
      - install-gflags
      - install-clang-10
-      - install-gtest-parallel
-      - run:
-          name: "Build unit tests"
-          command: |
-            echo "env: $(env)"
-            ROCKSDBTESTS_START=<<parameters.start_test>> ROCKSDBTESTS_END=<<parameters.end_test>> ROCKSDBTESTS_SUBSET_TESTS_TO_FILE=/tmp/test_list COMPILE_WITH_TSAN=1 CC=clang-10 CXX=clang++-10 ROCKSDB_DISABLE_ALIGNED_NEW=1 USE_CLANG=1 make V=1 -j32 --output-sync=target build_subset_tests
-      - run:
-          name: "Run unit tests in parallel"
-          command: |
-            sed -i 's/[[:space:]]*$//; s/ / \.\//g; s/.*/.\/&/' /tmp/test_list
-            cat /tmp/test_list
-            gtest-parallel $(</tmp/test_list) --output_dir=/tmp | cat  # pipe to cat to continuously output status on circleci UI. Otherwise, no status will be printed while the job is running.
+      - run: COMPILE_WITH_TSAN=1 CC=clang-10 CXX=clang++-10 ROCKSDB_DISABLE_ALIGNED_NEW=1 USE_CLANG=1 make V=1 -j32 check # aligned new doesn't work for reason we haven't figured out.
      - post-steps

  build-linux-clang10-ubsan:
@@ -414,11 +367,11 @@ jobs:
  build-linux-gcc-8-no_test_run:
    machine:
      image: ubuntu-2004:202111-02
-    resource_class: xlarge
+    resource_class: large
    steps:
      - pre-steps
      - run: sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test && sudo apt-get update -y && sudo apt-get install gcc-8 g++-8 libgflags-dev
-      - run: CC=gcc-8 CXX=g++-8 V=1 make -j16 all
+      - run: CC=gcc-8 CXX=g++-8 V=1 make -j8 all
      - post-steps

  build-linux-gcc-10-cxx20-no_test_run:
@@ -428,7 +381,7 @@ jobs:
    steps:
      - pre-steps
      - run: sudo apt-get update -y && sudo apt-get install gcc-10 g++-10 libgflags-dev
-      - run: CC=gcc-10 CXX=g++-10 V=1 ROCKSDB_CXX_STANDARD=c++20 make -j16 all
+      - run: CC=gcc-10 CXX=g++-10 V=1 SKIP_LINK=1 ROCKSDB_CXX_STANDARD=c++20 make -j16 all # Linking broken because libgflags compiled with newer ABI
      - post-steps

  build-linux-gcc-11-no_test_run:
@@ -438,8 +391,7 @@ jobs:
    steps:
      - pre-steps
      - run: sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test && sudo apt-get update -y && sudo apt-get install gcc-11 g++-11 libgflags-dev
-      - install-benchmark
-      - run: CC=gcc-11 CXX=g++-11 V=1 make -j16 all microbench
+      - run: CC=gcc-11 CXX=g++-11 V=1 SKIP_LINK=1 make -j16 all # Linking broken because libgflags compiled with newer ABI
      - post-steps

  build-linux-clang-13-no_test_run:
@@ -449,30 +401,18 @@ jobs:
    steps:
      - pre-steps
      - install-clang-13
-      - install-benchmark
-      - run: CC=clang-13 CXX=clang++-13 USE_CLANG=1 make -j16 all microbench
+      - run: CC=clang-13 CXX=clang++-13 USE_CLANG=1 make -j16 all
      - post-steps

  # This job is only to make sure the microbench tests are able to run, the benchmark result is not meaningful as the CI host is changing.
-  build-linux-run-microbench:
+  build-linux-microbench:
    machine:
      image: ubuntu-2004:202111-02
-    resource_class: 2xlarge
+    resource_class: xlarge
    steps:
      - pre-steps
      - install-benchmark
-      - run: DEBUG_LEVEL=0 make -j32 run_microbench
-      - post-steps
-
-  build-linux-mini-crashtest:
-    machine:
-      image: ubuntu-2004:202111-02
-    resource_class: large
-    steps:
-      - pre-steps
-      - install-gflags
-      - install-compression-libs
-      - run: make V=1 -j8 CRASH_TEST_EXT_ARGS=--duration=960 blackbox_crash_test_with_atomic_flush
+      - run: DEBUG_LEVEL=0 make microbench
      - post-steps

  build-windows:
@@ -559,6 +499,9 @@ jobs:
            echo 'export PATH=$JAVA_HOME/bin:$PATH' >> $BASH_ENV
            which java && java -version
            which javac && javac -version
+      - run:
+          name: "Build RocksDBJava Shared Library"
+          command: make V=1 J=8 -j8 rocksdbjava
      - run:
          name: "Test RocksDBJava"
          command: make V=1 J=8 -j8 jtest
@@ -588,7 +531,7 @@ jobs:
  build-macos-java:
    macos:
      xcode: 12.5.1
-    resource_class: large
+    resource_class: medium
    environment:
      JAVA_HOME: /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
      ROCKSDB_DISABLE_JEMALLOC: 1 # jemalloc causes java 8 crash
@@ -604,15 +547,18 @@ jobs:
            echo 'export PATH=$JAVA_HOME/bin:$PATH' >> $BASH_ENV
            which java && java -version
            which javac && javac -version
+      - run:
+          name: "Build RocksDBJava Shared Library"
+          command: make V=1 J=8 -j8 rocksdbjava
      - run:
          name: "Test RocksDBJava"
-          command: make V=1 J=16 -j16 jtest
+          command: make V=1 J=8 -j8 jtest
      - post-steps

  build-macos-java-static:
    macos:
      xcode: 12.5.1
-    resource_class: large
+    resource_class: medium
    environment:
      JAVA_HOME: /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
    steps:
@@ -630,13 +576,13 @@ jobs:
            which javac && javac -version
      - run:
          name: "Build RocksDBJava x86 and ARM Static Libraries"
-          command: make V=1 J=16 -j16 rocksdbjavastaticosx
+          command: make V=1 J=8 -j8 rocksdbjavastaticosx
      - post-steps

  build-macos-java-static-universal:
    macos:
      xcode: 12.5.1
-    resource_class: large
+    resource_class: medium
    environment:
      JAVA_HOME: /Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home
    steps:
@@ -654,7 +600,7 @@ jobs:
            which javac && javac -version
      - run:
          name: "Build RocksDBJava Universal Binary Static Library"
-          command: make V=1 J=16 -j16 rocksdbjavastaticosx_ub
+          command: make V=1 J=8 -j8 rocksdbjavastaticosx_ub
      - post-steps

  build-examples:
@@ -673,7 +619,7 @@ jobs:
  build-cmake-mingw:
    machine:
      image: ubuntu-2004:202111-02
-    resource_class: large
+    resource_class: 2xlarge
    steps:
      - pre-steps
      - install-gflags
@@ -697,12 +643,30 @@ jobs:
    machine:
      image: ubuntu-2004:202111-02
    resource_class: 2xlarge
-    environment:
-      TEST_TMPDIR: /tmp/rocksdb_test_tmp
+    parameters:
+      start_test:
+        default: ""
+        type: string
+      end_test:
+        default: ""
+        type: string
    steps:
      - pre-steps
      - install-gflags
-      - run: make V=1 -j32 check
+      - install-gtest-parallel
+      - run:
+          name: "Build unit tests"
+          command: |
+            echo "env: $(env)"
+            echo "** done env"
+            ROCKSDBTESTS_START=<<parameters.start_test>> ROCKSDBTESTS_END=<<parameters.end_test>> ROCKSDBTESTS_SUBSET_TESTS_TO_FILE=/tmp/test_list make V=1 -j32 --output-sync=target build_subset_tests
+      - run:
+          name: "Run unit tests in parallel"
+          command: |
+            sed -i 's/[[:space:]]*$//; s/ / \.\//g; s/.*/.\/&/' /tmp/test_list
+            cat /tmp/test_list
+            export TEST_TMPDIR=/tmp/rocksdb_test_tmp
+            gtest-parallel $(</tmp/test_list) --output_dir=/tmp | cat  # pipe to cat to continuously output status on circleci UI. Otherwise, no status will be printed while the job is running.
      - post-steps

  build-linux-arm-test-full:
@@ -824,12 +788,7 @@ workflows:
      - build-linux-clang10-asan
  build-linux-clang10-mini-tsan:
    jobs:
-      - build-linux-clang10-mini-tsan:
-          start_test: ""
-          end_test: "env_test"
-      - build-linux-clang10-mini-tsan:
-          start_test: "env_test"
-          end_test: ""
+      - build-linux-clang10-mini-tsan
  build-linux-clang10-ubsan:
    jobs:
      - build-linux-clang10-ubsan
@@ -839,9 +798,6 @@ workflows:
  build-linux-unity-and-headers:
    jobs:
      - build-linux-unity-and-headers
-  build-linux-mini-crashtest:
-    jobs:
-      - build-linux-mini-crashtest
  build-windows-vs2019:
    jobs:
      - build-windows:
@@ -867,6 +823,20 @@ workflows:
  build-examples:
    jobs:
      - build-examples
+  build-linux-non-shm:
+    jobs:
+      - build-linux-non-shm:
+          start_test: ""
+          end_test: "db_options_test" # make sure unique in src.mk
+      - build-linux-non-shm:
+          start_test: "db_options_test" # make sure unique in src.mk
+          end_test: "filename_test" # make sure unique in src.mk
+      - build-linux-non-shm:
+          start_test: "filename_test" # make sure unique in src.mk
+          end_test: "statistics_test" # make sure unique in src.mk
+      - build-linux-non-shm:
+          start_test: "statistics_test" # make sure unique in src.mk
+          end_test: ""
  build-linux-compilers-no_test_run:
    jobs:
      - build-linux-clang-no_test_run
@@ -879,16 +849,18 @@ workflows:
  build-macos:
    jobs:
      - build-macos
-      - build-macos-cmake:
-          run_even_tests: true
-      - build-macos-cmake:
-          run_even_tests: false
+  build-macos-cmake:
+    jobs:
+      - build-macos-cmake
  build-cmake-mingw:
    jobs:
      - build-cmake-mingw
  build-linux-arm:
    jobs:
      - build-linux-arm
+  build-microbench:
+    jobs:
+      - build-linux-microbench
  build-fuzzers:
    jobs:
      - build-fuzzers
@@ -903,5 +875,3 @@ workflows:
    jobs:
      - build-format-compatible
      - build-linux-arm-test-full
-      - build-linux-run-microbench
-      - build-linux-non-shm
@@ -32,7 +32,7 @@ jobs:
    - name: Download clang-format-diff.py
      uses: wei/wget@v1
      with:
-        args: https://raw.githubusercontent.com/llvm/llvm-project/release/12.x/clang/tools/clang-format/clang-format-diff.py
+        args: https://raw.githubusercontent.com/llvm/llvm-project/main/clang/tools/clang-format/clang-format-diff.py

    - name: Check format
      run: VERBOSE_CHECK=1 make check-format
@@ -239,10 +239,10 @@ script:
      OPT=-DTRAVIS LIB_MODE=shared V=1 ROCKSDBTESTS_PLATFORM_DEPENDENT=only make -j$MK_PARALLEL all_but_some_tests check_some
      ;;
    1)
-      OPT=-DTRAVIS LIB_MODE=shared V=1 ROCKSDBTESTS_PLATFORM_DEPENDENT=exclude ROCKSDBTESTS_END=backup_engine_test make -j$MK_PARALLEL check_some
+      OPT=-DTRAVIS LIB_MODE=shared V=1 ROCKSDBTESTS_PLATFORM_DEPENDENT=exclude ROCKSDBTESTS_END=backupable_db_test make -j$MK_PARALLEL check_some
      ;;
    2)
-      OPT="-DTRAVIS -DROCKSDB_NAMESPACE=alternative_rocksdb_ns" LIB_MODE=shared V=1 make -j$MK_PARALLEL tools && OPT="-DTRAVIS -DROCKSDB_NAMESPACE=alternative_rocksdb_ns" LIB_MODE=shared V=1 ROCKSDBTESTS_PLATFORM_DEPENDENT=exclude ROCKSDBTESTS_START=backup_engine_test ROCKSDBTESTS_END=db_universal_compaction_test make -j$MK_PARALLEL check_some
+      OPT="-DTRAVIS -DROCKSDB_NAMESPACE=alternative_rocksdb_ns" LIB_MODE=shared V=1 make -j$MK_PARALLEL tools && OPT="-DTRAVIS -DROCKSDB_NAMESPACE=alternative_rocksdb_ns" LIB_MODE=shared V=1 ROCKSDBTESTS_PLATFORM_DEPENDENT=exclude ROCKSDBTESTS_START=backupable_db_test ROCKSDBTESTS_END=db_universal_compaction_test make -j$MK_PARALLEL check_some
      ;;
    3)
      OPT=-DTRAVIS LIB_MODE=shared V=1 ROCKSDBTESTS_PLATFORM_DEPENDENT=exclude ROCKSDBTESTS_START=db_universal_compaction_test ROCKSDBTESTS_END=table_properties_collector_test make -j$MK_PARALLEL check_some
@@ -2,7 +2,7 @@
 #     This cmake build is for Windows 64-bit only.
 #
 # Prerequisites:
-#     You must have at least Visual Studio 2019. Start the Developer Command Prompt window that is a part of Visual Studio installation.
+#     You must have at least Visual Studio 2015 Update 3. Start the Developer Command Prompt window that is a part of Visual Studio installation.
 #     Run the build commands from within the Developer Command Prompt window to have paths to the compiler and runtime libraries set.
 #     You must have git.exe in your %PATH% environment variable.
 #
@@ -629,7 +629,6 @@ set(SOURCES
        cache/cache_reservation_manager.cc
        cache/clock_cache.cc
        cache/lru_cache.cc
-        cache/lru_secondary_cache.cc
        cache/sharded_cache.cc
        db/arena_wrapped_db_iter.cc
        db/blob/blob_fetcher.cc
@@ -832,7 +831,6 @@ set(SOURCES
        util/coding.cc
        util/compaction_job_stats_impl.cc
        util/comparator.cc
-        util/compression.cc
        util/compression_context_cache.cc
        util/concurrent_task_limiter_impl.cc
        util/crc32c.cc
@@ -849,7 +847,7 @@ set(SOURCES
        util/thread_local.cc
        util/threadpool_imp.cc
        util/xxhash.cc
-        utilities/backup/backup_engine.cc
+        utilities/backupable/backupable_db.cc
        utilities/blob_db/blob_compaction_filter.cc
        utilities/blob_db/blob_db.cc
        utilities/blob_db/blob_db_impl.cc
@@ -1158,7 +1156,6 @@ if(WITH_TESTS)
        cache/cache_reservation_manager_test.cc
        cache/cache_test.cc
        cache/lru_cache_test.cc
-        cache/lru_secondary_cache_test.cc
        db/blob/blob_counting_iterator_test.cc
        db/blob/blob_file_addition_test.cc
        db/blob/blob_file_builder_test.cc
@@ -1315,7 +1312,7 @@ if(WITH_TESTS)
        util/thread_list_test.cc
        util/thread_local_test.cc
        util/work_queue_test.cc
-        utilities/backup/backup_engine_test.cc
+        utilities/backupable/backupable_db_test.cc
        utilities/blob_db/blob_db_test.cc
        utilities/cassandra/cassandra_functional_test.cc
        utilities/cassandra/cassandra_format_test.cc
@@ -1336,7 +1333,6 @@ if(WITH_TESTS)
        utilities/transactions/optimistic_transaction_test.cc
        utilities/transactions/transaction_test.cc
        utilities/transactions/lock/point/point_lock_manager_test.cc
-        utilities/transactions/write_committed_transaction_ts_test.cc
        utilities/transactions/write_prepared_transaction_test.cc
        utilities/transactions/write_unprepared_transaction_test.cc
        utilities/transactions/lock/range/range_locking_test.cc
@@ -1,54 +1,29 @@
 # Rocksdb Change Log
-## Unreleased
+## 7.0.4 (03/29/2022)
 ### Bug Fixes
-* Fixed bug which caused rocksdb failure in the situation when rocksdb was accessible using UNC path
+* Fixed a race condition when disable and re-enable manual compaction.
+* Fixed a race condition for `alive_log_files_` in non-two-write-queues mode. The race is between the write_thread_ in WriteToWAL() and another thread executing `FindObsoleteFiles()`. The race condition will be caught if `__glibcxx_requires_nonempty` is enabled.
+* Fixed a race condition when mmaping a WritableFile on POSIX.
 * Fixed a race condition when 2PC is disabled and WAL tracking in the MANIFEST is enabled. The race condition is between two background flush threads trying to install flush results, causing a WAL deletion not tracked in the MANIFEST. A future DB open may fail.
 * Fixed a heap use-after-free race with DropColumnFamily.
 * Fixed a bug that `rocksdb.read.block.compaction.micros` cannot track compaction stats (#9722).
-* Fixed `file_type`, `relative_filename` and `directory` fields returned by `GetLiveFilesMetaData()`, which were added in inheriting from `FileStorageInfo`.
-* Fixed a bug affecting `track_and_verify_wals_in_manifest`. Without the fix, application may see "open error: Corruption: Missing WAL with log number" while trying to open the db. The corruption is a false alarm but prevents DB open (#9766).
-* Fix segfault in FilePrefetchBuffer with async_io as it doesn't wait for pending jobs to complete on destruction.
-* Fix ERROR_HANDLER_AUTORESUME_RETRY_COUNT stat whose value was set wrong in portal.h
-
-### New Features
-* For db_bench when --seed=0 or --seed is not set then it uses the current time as the seed value. Previously it used the value 1000.
-* For db_bench when --benchmark lists multiple tests and each test uses a seed for a RNG then the seeds across tests will no longer be repeated.
-* Added an option to dynamically charge an updating estimated memory usage of block-based table reader to block cache if block cache available. To enable this feature, set `BlockBasedTableOptions::reserve_table_reader_memory = true`.
-* Add new stat ASYNC_READ_BYTES that calculates number of bytes read during async read call and users can check if async code path is being called by RocksDB internal automatic prefetching for sequential reads.
-
-### Behavior changes
-* Disallow usage of commit-time-write-batch for write-prepared/write-unprepared transactions if TransactionOptions::use_only_the_last_commit_time_batch_for_recovery is false to prevent two (or more) uncommitted versions of the same key in the database. Otherwise, bottommost compaction may violate the internal key uniqueness invariant of SSTs if the sequence numbers of both internal keys are zeroed out (#9794).
-
-## 7.1.0 (03/23/2022)
-### New Features
-* Allow WriteBatchWithIndex to index a WriteBatch that includes keys with user-defined timestamps. The index itself does not have timestamp.
-* Add support for user-defined timestamps to write-committed transaction without API change. The `TransactionDB` layer APIs do not allow timestamps because we require that all user-defined-timestamps-aware operations go through the `Transaction` APIs.
-* Added BlobDB options to `ldb`
-* `BlockBasedTableOptions::detect_filter_construct_corruption` can now be dynamically configured using `DB::SetOptions`.
-* Automatically recover from retryable read IO errors during backgorund flush/compaction.
-* Experimental support for preserving file Temperatures through backup and restore, and for updating DB metadata for outside changes to file Temperature (`UpdateManifestForFilesState` or `ldb update_manifest --update_temperatures`).
-* Experimental support for async_io in ReadOptions which is used by FilePrefetchBuffer to prefetch some of the data asynchronously,  if reads are sequential and auto readahead is enabled by rocksdb internally.

+## 7.0.3 (03/23/2022)
 ### Bug Fixes
 * Fixed a major performance bug in which Bloom filters generated by pre-7.0 releases are not read by early 7.0.x releases (and vice-versa) due to changes to FilterPolicy::Name() in #9590. This can severely impact read performance and read I/O on upgrade or downgrade with existing DB, but not data correctness.
-* Fixed a data race on `versions_` between `DBImpl::ResumeImpl()` and threads waiting for recovery to complete (#9496)
-* Fixed a bug caused by race among flush, incoming writes and taking snapshots. Queries to snapshots created with these race condition can return incorrect result, e.g. resurfacing deleted data.
-* Fixed a bug that DB flush uses `options.compression` even `options.compression_per_level` is set.
-* Fixed a bug that DisableManualCompaction may assert when disable an unscheduled manual compaction.
-* Fix a race condition when cancel manual compaction with `DisableManualCompaction`. Also DB close can cancel the manual compaction thread.
-* Fixed a potential timer crash when open close DB concurrently.
-* Fixed a race condition for `alive_log_files_` in non-two-write-queues mode. The race is between the write_thread_ in WriteToWAL() and another thread executing `FindObsoleteFiles()`. The race condition will be caught if `__glibcxx_requires_nonempty` is enabled.
 * Fixed a bug that `Iterator::Refresh()` reads stale keys after DeleteRange() performed.
-* Fixed a race condition when disable and re-enable manual compaction.
-* Fixed automatic error recovery failure in atomic flush.
-* Fixed a race condition when mmaping a WritableFile on POSIX.

 ### Public API changes
-* Added pure virtual FilterPolicy::CompatibilityName(), which is needed for fixing major performance bug involving FilterPolicy naming in SST metadata without affecting Customizable aspect of FilterPolicy. This change only affects those with their own custom or wrapper FilterPolicy classes.
-* `options.compression_per_level` is dynamically changeable with `SetOptions()`.
-* Added `WriteOptions::rate_limiter_priority`. When set to something other than `Env::IO_TOTAL`, the internal rate limiter (`DBOptions::rate_limiter`) will be charged at the specified priority for writes associated with the API to which the `WriteOptions` was provided. Currently the support covers automatic WAL flushes, which happen during live updates (`Put()`, `Write()`, `Delete()`, etc.) when `WriteOptions::disableWAL == false` and `DBOptions::manual_wal_flush == false`.
-* Add DB::OpenAndTrimHistory API. This API will open DB and trim data to the timestamp specified by trim_ts (The data with timestamp larger than specified trim bound will be removed). This API should only be used at a timestamp-enabled column families recovery. If the column family doesn't have timestamp enabled, this API won't trim any data on that column family. This API is not compatible with avoid_flush_during_recovery option.
-* Remove BlockBasedTableOptions.hash_index_allow_collision which already takes no effect.
+* Added pure virtual FilterPolicy::CompatibilityName(), which is needed for fixing major performance bug involving FilterPolicy naming in SST metadata without affecting Customizable aspect of FilterPolicy. For source code, this change only affects those with their own custom or wrapper FilterPolicy classes, but does break compiled library binary compatibility in a patch release.
+
+## 7.0.2 (03/12/2022)
+* Fixed a bug that DisableManualCompaction may assert when disable an unscheduled manual compaction.
+
+## 7.0.1 (03/02/2022)
+### Bug Fixes
+* Fix a race condition when cancel manual compaction with `DisableManualCompaction`. Also DB close can cancel the manual compaction thread.
+* Fixed a data race on `versions_` between `DBImpl::ResumeImpl()` and threads waiting for recovery to complete (#9496)
+* Fixed a bug caused by race among flush, incoming writes and taking snapshots. Queries to snapshots created with these race condition can return incorrect result, e.g. resurfacing deleted data.

 ## 7.0.0 (02/20/2022)
 ### Bug Fixes
@@ -1678,7 +1653,7 @@ if set to something > 0 user will see 2 changes in iterators behavior 1) only ke
 * Added a new way to report QPS from db_bench (check out --report_file and --report_interval_seconds)
 * Added a cache for individual rows. See DBOptions::row_cache for more info.
 * Several new features on EventListener (see include/rocksdb/listener.h):
- - OnCompactionCompleted() now returns per-compaction job statistics, defined in include/rocksdb/compaction_job_stats.h.
+ - OnCompationCompleted() now returns per-compaction job statistics, defined in include/rocksdb/compaction_job_stats.h.
 - Added OnTableFileCreated() and OnTableFileDeleted().
 * Add compaction_options_universal.enable_trivial_move to true, to allow trivial move while performing universal compaction. Trivial move will happen only when all the input files are non overlapping.

@@ -47,7 +47,7 @@ to build a portable binary, add `PORTABLE=1` before your make commands, like thi

 * If you wish to build the RocksJava static target, then cmake is required for building Snappy.

-* If you wish to run microbench (e.g, `make microbench`, `make ribbon_bench` or `cmake -DWITH_BENCHMARK=1`), Google benchmark >= 1.6.0 is needed.
+* If you wish to run microbench (e.g, `make microbench`, `make ribbon_bench` or `cmake -DWITH_BENCHMARK=1`), Google benchmark < 1.6.0 is needed.

 ## Supported platforms

@@ -180,7 +180,8 @@ to build a portable binary, add `PORTABLE=1` before your make commands, like thi
 * **iOS**:
  * Run: `TARGET_OS=IOS make static_lib`. When building the project which uses rocksdb iOS library, make sure to define two important pre-processing macros: `ROCKSDB_LITE` and `IOS_CROSS_COMPILE`.

-* **Windows** (Visual Studio 2017 to up):
+* **Windows**:
+  * For building with MS Visual Studio 13 you will need Update 4 installed.
  * Read and follow the instructions at CMakeLists.txt
  * Or install via [vcpkg](https://github.com/microsoft/vcpkg)
       * run `vcpkg install rocksdb:x64-windows`
@@ -8,7 +8,11 @@

 BASH_EXISTS := $(shell which bash)
 SHELL := $(shell which bash)
-include python.mk
+# Default to python3. Some distros like CentOS 8 do not have `python`.
+ifeq ($(origin PYTHON), undefined)
+	PYTHON := $(shell which python3 || which python || echo python3)
+endif
+export PYTHON

 CLEAN_FILES = # deliberately empty, so we can append below.
 CFLAGS += ${EXTRA_CFLAGS}
@@ -789,9 +793,7 @@ endif  # PLATFORM_SHARED_EXT
 	blackbox_crash_test_with_atomic_flush whitebox_crash_test_with_atomic_flush  \
 	blackbox_crash_test_with_txn whitebox_crash_test_with_txn \
 	blackbox_crash_test_with_best_efforts_recovery \
-	blackbox_crash_test_with_ts whitebox_crash_test_with_ts \
-	blackbox_crash_test_with_multiops_wc_txn \
-	blackbox_crash_test_with_multiops_wp_txn
+	blackbox_crash_test_with_ts whitebox_crash_test_with_ts


 all: $(LIBRARY) $(BENCHMARKS) tools tools_lib test_libs $(TESTS)
@@ -813,8 +815,6 @@ test_libs: $(TEST_LIBS)
 benchmarks: $(BENCHMARKS)

 microbench: $(MICROBENCHS)
-
-run_microbench: $(MICROBENCHS)
 	for t in $(MICROBENCHS); do echo "===== Running benchmark $$t (`date`)"; ./$$t || exit 1; done;

 dbg: $(LIBRARY) $(BENCHMARKS) tools $(TESTS)
@@ -826,8 +826,8 @@ release: clean
 coverage: clean
 	COVERAGEFLAGS="-fprofile-arcs -ftest-coverage" LDFLAGS+="-lgcov" $(MAKE) J=1 all check
 	cd coverage && ./coverage_test.sh
-	# Delete intermediate files
-	$(FIND) . -type f \( -name "*.gcda" -o -name "*.gcno" \) -exec rm -f {} \;
+        # Delete intermediate files
+	$(FIND) . -type f -regex ".*\.\(\(gcda\)\|\(gcno\)\)" -exec rm -f {} \;

 ifneq (,$(filter check parallel_check,$(MAKECMDGOALS)),)
 # Use /dev/shm if it has the sticky bit set (otherwise, /tmp),
@@ -909,7 +909,7 @@ gen_parallel_tests:
 # 107.816 PASS t/DBTest.EncodeDecompressedBlockSizeTest
 #
 slow_test_regexp = \
-	^.*MySQLStyleTransactionTest.*$$|^.*SnapshotConcurrentAccessTest.*$$|^.*SeqAdvanceConcurrentTest.*$$|^t/run-table_test-HarnessTest.Randomized$$|^t/run-db_test-.*(?:FileCreationRandomFailure|EncodeDecompressedBlockSizeTest)$$|^.*RecoverFromCorruptedWALWithoutFlush$$
+	^.*SnapshotConcurrentAccessTest.*$$|^.*SeqAdvanceConcurrentTest.*$$|^t/run-table_test-HarnessTest.Randomized$$|^t/run-db_test-.*(?:FileCreationRandomFailure|EncodeDecompressedBlockSizeTest)$$|^.*RecoverFromCorruptedWALWithoutFlush$$
 prioritize_long_running_tests =						\
  perl -pe 's,($(slow_test_regexp)),100 $$1,'				\
    | sort -k1,1gr							\
@@ -1029,34 +1029,92 @@ check_some: $(ROCKSDBTESTS_SUBSET)
 ldb_tests: ldb
 	$(PYTHON) tools/ldb_test.py

-include crash_test.mk
+crash_test:
+# Do not parallelize
+	$(MAKE) whitebox_crash_test
+	$(MAKE) blackbox_crash_test
+
+crash_test_with_atomic_flush:
+# Do not parallelize
+	$(MAKE) whitebox_crash_test_with_atomic_flush
+	$(MAKE) blackbox_crash_test_with_atomic_flush
+
+crash_test_with_txn:
+# Do not parallelize
+	$(MAKE) whitebox_crash_test_with_txn
+	$(MAKE) blackbox_crash_test_with_txn
+
+crash_test_with_best_efforts_recovery: blackbox_crash_test_with_best_efforts_recovery
+
+crash_test_with_ts:
+# Do not parallelize
+	$(MAKE) whitebox_crash_test_with_ts
+	$(MAKE) blackbox_crash_test_with_ts
+
+blackbox_crash_test: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --simple blackbox $(CRASH_TEST_EXT_ARGS)
+	$(PYTHON) -u tools/db_crashtest.py blackbox $(CRASH_TEST_EXT_ARGS)
+
+blackbox_crash_test_with_atomic_flush: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --cf_consistency blackbox $(CRASH_TEST_EXT_ARGS)
+
+blackbox_crash_test_with_txn: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --txn blackbox $(CRASH_TEST_EXT_ARGS)
+
+blackbox_crash_test_with_best_efforts_recovery: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --test_best_efforts_recovery blackbox $(CRASH_TEST_EXT_ARGS)
+
+blackbox_crash_test_with_ts: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --enable_ts blackbox $(CRASH_TEST_EXT_ARGS)
+
+ifeq ($(CRASH_TEST_KILL_ODD),)
+  CRASH_TEST_KILL_ODD=888887
+endif
+
+whitebox_crash_test: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --simple whitebox --random_kill_odd \
+      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
+	$(PYTHON) -u tools/db_crashtest.py whitebox  --random_kill_odd \
+      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
+
+whitebox_crash_test_with_atomic_flush: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --cf_consistency whitebox  --random_kill_odd \
+      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
+
+whitebox_crash_test_with_txn: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --txn whitebox --random_kill_odd \
+      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
+
+whitebox_crash_test_with_ts: db_stress
+	$(PYTHON) -u tools/db_crashtest.py --enable_ts whitebox --random_kill_odd \
+      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)

 asan_check: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) check -j32
+	COMPILE_WITH_ASAN=1 $(MAKE) check -j32
 	$(MAKE) clean

 asan_crash_test: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) crash_test
+	COMPILE_WITH_ASAN=1 $(MAKE) crash_test
 	$(MAKE) clean

 whitebox_asan_crash_test: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) whitebox_crash_test
+	COMPILE_WITH_ASAN=1 $(MAKE) whitebox_crash_test
 	$(MAKE) clean

 blackbox_asan_crash_test: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) blackbox_crash_test
+	COMPILE_WITH_ASAN=1 $(MAKE) blackbox_crash_test
 	$(MAKE) clean

 asan_crash_test_with_atomic_flush: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) crash_test_with_atomic_flush
+	COMPILE_WITH_ASAN=1 $(MAKE) crash_test_with_atomic_flush
 	$(MAKE) clean

 asan_crash_test_with_txn: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) crash_test_with_txn
+	COMPILE_WITH_ASAN=1 $(MAKE) crash_test_with_txn
 	$(MAKE) clean

 asan_crash_test_with_best_efforts_recovery: clean
-	ASAN_OPTIONS=detect_stack_use_after_return=1 COMPILE_WITH_ASAN=1 $(MAKE) crash_test_with_best_efforts_recovery
+	COMPILE_WITH_ASAN=1 $(MAKE) crash_test_with_best_efforts_recovery
 	$(MAKE) clean

 ubsan_check: clean
@@ -1214,9 +1272,9 @@ clean-rocks:
 	rm -f $(BENCHMARKS) $(TOOLS) $(TESTS) $(PARALLEL_TEST) $(ALL_STATIC_LIBS) $(ALL_SHARED_LIBS) $(MICROBENCHS)
 	rm -rf $(CLEAN_FILES) ios-x86 ios-arm scan_build_report
 	$(FIND) . -name "*.[oda]" -exec rm -f {} \;
-	$(FIND) . -type f \( -name "*.gcda" -o -name "*.gcno" \) -exec rm -f {} \;
+	$(FIND) . -type f -regex ".*\.\(\(gcda\)\|\(gcno\)\)" -exec rm -f {} \;

-clean-rocksjava: clean-rocks
+clean-rocksjava:
 	rm -rf jl jls
 	cd java && $(MAKE) clean

@@ -1551,7 +1609,7 @@ perf_context_test: $(OBJ_DIR)/db/perf_context_test.o $(TEST_LIBRARY) $(LIBRARY)
 prefix_test: $(OBJ_DIR)/db/prefix_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)

-backup_engine_test: $(OBJ_DIR)/utilities/backup/backup_engine_test.o $(TEST_LIBRARY) $(LIBRARY)
+backupable_db_test: $(OBJ_DIR)/utilities/backupable/backupable_db_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)

 checkpoint_test: $(OBJ_DIR)/utilities/checkpoint/checkpoint_test.o $(TEST_LIBRARY) $(LIBRARY)
@@ -1806,9 +1864,6 @@ point_lock_manager_test: utilities/transactions/lock/point/point_lock_manager_te
 transaction_test: $(OBJ_DIR)/utilities/transactions/transaction_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)

-write_committed_transaction_ts_test: $(OBJ_DIR)/utilities/transactions/write_committed_transaction_ts_test.o $(TEST_LIBRARY) $(LIBRARY)
-	$(AM_LINK)
-
 write_prepared_transaction_test: $(OBJ_DIR)/utilities/transactions/write_prepared_transaction_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)

@@ -1842,9 +1897,6 @@ statistics_test: $(OBJ_DIR)/monitoring/statistics_test.o $(TEST_LIBRARY) $(LIBRA
 stats_history_test: $(OBJ_DIR)/monitoring/stats_history_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)

-lru_secondary_cache_test: $(OBJ_DIR)/cache/lru_secondary_cache_test.o $(TEST_LIBRARY) $(LIBRARY)
-	$(AM_LINK)
-
 lru_cache_test: $(OBJ_DIR)/cache/lru_cache_test.o $(TEST_LIBRARY) $(LIBRARY)
 	$(AM_LINK)

@@ -2044,9 +2096,9 @@ ROCKSDB_JAVADOCS_JAR = rocksdbjni-$(ROCKSDB_JAVA_VERSION)-javadoc.jar
 ROCKSDB_SOURCES_JAR = rocksdbjni-$(ROCKSDB_JAVA_VERSION)-sources.jar
 SHA256_CMD = sha256sum

-ZLIB_VER ?= 1.2.12
-ZLIB_SHA256 ?= 91844808532e5ce316b3c010929493c0244f3d37593afd6de04f71821d5136d9
-ZLIB_DOWNLOAD_BASE ?= http://zlib.net
+ZLIB_VER ?= 1.2.11
+ZLIB_SHA256 ?= c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
+ZLIB_DOWNLOAD_BASE ?= https://zlib.net/fossils
 BZIP2_VER ?= 1.0.8
 BZIP2_SHA256 ?= ab5a03176ee106d3f0fa90e381da478ddae405918153cca248e682cd0c4a2269
 BZIP2_DOWNLOAD_BASE ?= http://sourceware.org/pub/bzip2
@@ -2372,10 +2424,10 @@ jtest: rocksdbjava
 jdb_bench:
 	cd java;$(MAKE) db_bench;

-commit_prereq:
-	echo "TODO: bring this back using parts of old precommit_checker.py and rocksdb-lego-determinator"
-	false # J=$(J) build_tools/precommit_checker.py unit clang_unit release clang_release tsan asan ubsan lite unit_non_shm
-	# $(MAKE) clean && $(MAKE) jclean && $(MAKE) rocksdbjava;
+commit_prereq: build_tools/rocksdb-lego-determinator \
+               build_tools/precommit_checker.py
+	J=$(J) build_tools/precommit_checker.py unit unit_481 clang_unit release release_481 clang_release tsan asan ubsan lite unit_non_shm
+	$(MAKE) clean && $(MAKE) jclean && $(MAKE) rocksdbjava;

 # ---------------------------------------------------------------------------
 #  	Platform-specific compilation
@@ -2472,9 +2524,6 @@ endif
 build_subset_tests: $(ROCKSDBTESTS_SUBSET)
 	$(AM_V_GEN)if [ -n "$${ROCKSDBTESTS_SUBSET_TESTS_TO_FILE}" ]; then echo "$(ROCKSDBTESTS_SUBSET)" > "$${ROCKSDBTESTS_SUBSET_TESTS_TO_FILE}"; else echo "$(ROCKSDBTESTS_SUBSET)"; fi

-list_all_tests:
-	echo "$(ROCKSDBTESTS_SUBSET)"
-
 # Remove the rules for which dependencies should not be generated and see if any are left.
 #If so, include the dependencies; if not, do not include the dependency files
 ROCKS_DEP_RULES=$(filter-out clean format check-format check-buck-targets check-headers check-sources jclean jtest package analyze tags rocksdbjavastatic% unity.% unity_test, $(MAKECMDGOALS))
@@ -4,7 +4,7 @@ RocksDBLite is a project focused on mobile use cases, which don't need a lot of

 Some examples of the features disabled by ROCKSDB_LITE:
 * compiled-in support for LDB tool
-* No backup engine
+* No backupable DB
 * No support for replication (which we provide in form of TransactionalIterator)
 * No advanced monitoring tools
 * No special-purpose memtables that are highly optimized for specific use cases
@@ -210,34 +210,14 @@ def generate_targets(repo_path, deps_map):
        with open(f"{repo_path}/buckifier/bench.json") as json_file:
            fast_fancy_bench_config_list = json.load(json_file)
            for config_dict in fast_fancy_bench_config_list:
-                clean_benchmarks = {}
-                benchmarks = config_dict['benchmarks']
-                for binary, benchmark_dict in benchmarks.items():
-                    clean_benchmarks[binary] = {}
-                    for benchmark, overloaded_metric_list in benchmark_dict.items():
-                        clean_benchmarks[binary][benchmark] = []
-                        for metric in overloaded_metric_list:
-                            if not isinstance(metric, dict):
-                                clean_benchmarks[binary][benchmark].append(metric)
-                TARGETS.add_fancy_bench_config(config_dict['name'], clean_benchmarks, False, config_dict['expected_runtime_one_iter'], config_dict['sl_iterations'], config_dict['regression_threshold'])
+                TARGETS.add_fancy_bench_config(config_dict['name'],config_dict['benchmarks'], False, config_dict['expected_runtime'])

        with open(f"{repo_path}/buckifier/bench-slow.json") as json_file:
            slow_fancy_bench_config_list = json.load(json_file)
            for config_dict in slow_fancy_bench_config_list:
-                clean_benchmarks = {}
-                benchmarks = config_dict['benchmarks']
-                for binary, benchmark_dict in benchmarks.items():
-                    clean_benchmarks[binary] = {}
-                    for benchmark, overloaded_metric_list in benchmark_dict.items():
-                        clean_benchmarks[binary][benchmark] = []
-                        for metric in overloaded_metric_list:
-                            if not isinstance(metric, dict):
-                                clean_benchmarks[binary][benchmark].append(metric)
-            for config_dict in slow_fancy_bench_config_list:
-                TARGETS.add_fancy_bench_config(config_dict['name']+"_slow", clean_benchmarks, True, config_dict['expected_runtime_one_iter'], config_dict['sl_iterations'], config_dict['regression_threshold'])
-    # it is better servicelab experiments break
-    # than rocksdb github ci
-    except Exception:
+                TARGETS.add_fancy_bench_config(config_dict['name']+"_slow",config_dict['benchmarks'], True, config_dict['expected_runtime'])
+
+    except (FileNotFoundError, KeyError):
        pass

    TARGETS.add_test_header()
@@ -92,14 +92,12 @@ add_c_test_wrapper()
        # will not be included.
 """)

-    def add_fancy_bench_config(self, name, bench_config, slow, expected_runtime, sl_iterations, regression_threshold):
+    def add_fancy_bench_config(self, name, bench_config, slow, expected_runtime):
        self.targets_file.write(targets_cfg.fancy_bench_template.format(
                    name=name,
                    bench_config=pprint.pformat(bench_config),
                    slow=slow,
                    expected_runtime=expected_runtime,
-                    sl_iterations=sl_iterations,
-                    regression_threshold=regression_threshold
                    ).encode("utf-8"))

    def register_test(self,
@@ -41,6 +41,6 @@ cpp_unittest_wrapper(name="{test_name}",
 """

 fancy_bench_template = """
-fancy_bench_wrapper(suite_name="{name}", binary_to_bench_to_metric_list_map={bench_config}, slow={slow}, expected_runtime={expected_runtime}, sl_iterations={sl_iterations}, regression_threshold={regression_threshold})
+fancy_bench_wrapper(suite_name="{name}", binary_to_bench_to_metric_list_map={bench_config}, slow={slow}, expected_runtime={expected_runtime})

 """
@@ -63,7 +63,18 @@ if [ -z "$ROCKSDB_NO_FBCODE" -a -d /mnt/gvfs/third-party ]; then
    if [ "$LIB_MODE" == "shared" ]; then
      PIC_BUILD=1
    fi
-    source "$PWD/build_tools/fbcode_config_platform009.sh"
+    if [ -n "$ROCKSDB_FBCODE_BUILD_WITH_481" ]; then
+      # we need this to build with MySQL. Don't use for other purposes.
+      source "$PWD/build_tools/fbcode_config4.8.1.sh"
+    elif [ -n "$ROCKSDB_FBCODE_BUILD_WITH_5xx" ]; then
+      source "$PWD/build_tools/fbcode_config.sh"
+    elif [ -n "$ROCKSDB_FBCODE_BUILD_WITH_PLATFORM007" ]; then
+      source "$PWD/build_tools/fbcode_config_platform007.sh"
+    elif [ -n "$ROCKSDB_FBCODE_BUILD_WITH_PLATFORM009" ]; then
+      source "$PWD/build_tools/fbcode_config_platform009.sh"
+    else
+      source "$PWD/build_tools/fbcode_config_platform009.sh"
+    fi
 fi

 # Delete existing output, if it exists
@@ -587,7 +598,7 @@ EOF
    fi
    if ! test $ROCKSDB_DISABLE_BENCHMARK; then
        # Test whether google benchmark is available
-        $CXX $PLATFORM_CXXFLAGS -x c++ - -o /dev/null -lbenchmark -lpthread 2>/dev/null  <<EOF
+        $CXX $PLATFORM_CXXFLAGS -x c++ - -o /dev/null -lbenchmark 2>/dev/null  <<EOF
          #include <benchmark/benchmark.h>
          int main() {}
 EOF
@@ -627,9 +638,6 @@ if test "0$PORTABLE" -eq 0; then
      COMMON_FLAGS="$COMMON_FLAGS -march=z196 "
    fi
    COMMON_FLAGS="$COMMON_FLAGS"
-  elif test -n "`echo $TARGET_ARCHITECTURE | grep ^riscv64`"; then
-    RISC_ISA=$(cat /proc/cpuinfo | grep isa | head -1 | cut --delimiter=: -f 2 | cut -b 2-)
-    COMMON_FLAGS="$COMMON_FLAGS -march=${RISC_ISA}"
  elif [ "$TARGET_OS" == "IOS" ]; then
    COMMON_FLAGS="$COMMON_FLAGS"
  elif [ "$TARGET_OS" == "AIX" ] || [ "$TARGET_OS" == "SunOS" ]; then
@@ -650,11 +658,6 @@ else
    COMMON_FLAGS="$COMMON_FLAGS -march=z196 "
  fi

-  if test -n "`echo $TARGET_ARCHITECTURE | grep ^riscv64`"; then
-    RISC_ISA=$(cat /proc/cpuinfo | grep isa | head -1 | cut --delimiter=: -f 2 | cut -b 2-)
-    COMMON_FLAGS="$COMMON_FLAGS -march=${RISC_ISA}"
-  fi
-
  if [[ "${PLATFORM}" == "OS_MACOSX" ]]; then
    # For portability compile for macOS 10.12 (2016) or newer
    COMMON_FLAGS="$COMMON_FLAGS -mmacosx-version-min=10.12"
@@ -0,0 +1,19 @@
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+GCC_BASE=/mnt/gvfs/third-party2/gcc/7331085db891a2ef4a88a48a751d834e8d68f4cb/5.x/centos7-native/c447969
+CLANG_BASE=/mnt/gvfs/third-party2/llvm-fb/1bd23f9917738974ad0ff305aa23eb5f93f18305/9.0.0/centos7-native/c9f9104
+LIBGCC_BASE=/mnt/gvfs/third-party2/libgcc/6ace84e956873d53638c738b6f65f3f469cca74c/5.x/gcc-5-glibc-2.23/339d858
+GLIBC_BASE=/mnt/gvfs/third-party2/glibc/192b0f42d63dcf6210d6ceae387b49af049e6e0c/2.23/gcc-5-glibc-2.23/ca1d1c0
+SNAPPY_BASE=/mnt/gvfs/third-party2/snappy/7f9bdaada18f59bc27ec2b0871eb8a6144343aef/1.1.3/gcc-5-glibc-2.23/9bc6787
+ZLIB_BASE=/mnt/gvfs/third-party2/zlib/2d9f0b9a4274cc21f61272a9e89bdb859bce8f1f/1.2.8/gcc-5-glibc-2.23/9bc6787
+BZIP2_BASE=/mnt/gvfs/third-party2/bzip2/dc49a21c5fceec6456a7a28a94dcd16690af1337/1.0.6/gcc-5-glibc-2.23/9bc6787
+LZ4_BASE=/mnt/gvfs/third-party2/lz4/0f607f8fc442ea7d6b876931b1898bb573d5e5da/1.9.1/gcc-5-glibc-2.23/9bc6787
+ZSTD_BASE=/mnt/gvfs/third-party2/zstd/ca22bc441a4eb709e9e0b1f9fec9750fed7b31c5/1.4.x/gcc-5-glibc-2.23/03859b5
+GFLAGS_BASE=/mnt/gvfs/third-party2/gflags/0b9929d2588991c65a57168bf88aff2db87c5d48/2.2.0/gcc-5-glibc-2.23/9bc6787
+JEMALLOC_BASE=/mnt/gvfs/third-party2/jemalloc/c26f08f47ac35fc31da2633b7da92d6b863246eb/master/gcc-5-glibc-2.23/0c8f76d
+NUMA_BASE=/mnt/gvfs/third-party2/numa/3f3fb57a5ccc5fd21c66416c0b83e0aa76a05376/2.0.11/gcc-5-glibc-2.23/9bc6787
+LIBUNWIND_BASE=/mnt/gvfs/third-party2/libunwind/40c73d874898b386a71847f1b99115d93822d11f/1.4/gcc-5-glibc-2.23/b443de1
+TBB_BASE=/mnt/gvfs/third-party2/tbb/4ce8e8dba77cdbd81b75d6f0c32fd7a1b76a11ec/2018_U5/gcc-5-glibc-2.23/9bc6787
+KERNEL_HEADERS_BASE=/mnt/gvfs/third-party2/kernel-headers/fb251ecd2f5ae16f8671f7014c246e52a748fe0b/4.0.9-36_fbk5_2933_gd092e3f/gcc-5-glibc-2.23/da39a3e
+BINUTILS_BASE=/mnt/gvfs/third-party2/binutils/2e3cb7d119b3cea5f1e738cc13a1ac69f49eb875/2.29.1/centos7-native/da39a3e
+VALGRIND_BASE=/mnt/gvfs/third-party2/valgrind/d42d152a15636529b0861ec493927200ebebca8e/3.15.0/gcc-5-glibc-2.23/9bc6787
+LUA_BASE=/mnt/gvfs/third-party2/lua/f0cd714433206d5139df61659eb7b28b1dea6683/5.2.3/gcc-5-glibc-2.23/65372bd
@@ -0,0 +1,20 @@
+# shellcheck disable=SC2148
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+GCC_BASE=/mnt/gvfs/third-party2/gcc/cf7d14c625ce30bae1a4661c2319c5a283e4dd22/4.8.1/centos6-native/cc6c9dc
+CLANG_BASE=/mnt/gvfs/third-party2/llvm-fb/8598c375b0e94e1448182eb3df034704144a838d/stable/centos6-native/3f16ddd
+LIBGCC_BASE=/mnt/gvfs/third-party2/libgcc/d6e0a7da6faba45f5e5b1638f9edd7afc2f34e7d/4.8.1/gcc-4.8.1-glibc-2.17/8aac7fc
+GLIBC_BASE=/mnt/gvfs/third-party2/glibc/d282e6e8f3d20f4e40a516834847bdc038e07973/2.17/gcc-4.8.1-glibc-2.17/99df8fc
+SNAPPY_BASE=/mnt/gvfs/third-party2/snappy/8c38a4c1e52b4c2cc8a9cdc31b9c947ed7dbfcb4/1.1.3/gcc-4.8.1-glibc-2.17/c3f970a
+ZLIB_BASE=/mnt/gvfs/third-party2/zlib/0882df3713c7a84f15abe368dc004581f20b39d7/1.2.8/gcc-4.8.1-glibc-2.17/c3f970a
+BZIP2_BASE=/mnt/gvfs/third-party2/bzip2/740325875f6729f42d28deaa2147b0854f3a347e/1.0.6/gcc-4.8.1-glibc-2.17/c3f970a
+LZ4_BASE=/mnt/gvfs/third-party2/lz4/0e790b441e2d9acd68d51e1d2e028f88c6a79ddf/r131/gcc-4.8.1-glibc-2.17/c3f970a
+ZSTD_BASE=/mnt/gvfs/third-party2/zstd/9455f75ff7f4831dc9fda02a6a0f8c68922fad8f/1.0.0/gcc-4.8.1-glibc-2.17/c3f970a
+GFLAGS_BASE=/mnt/gvfs/third-party2/gflags/f001a51b2854957676d07306ef3abf67186b5c8b/2.1.1/gcc-4.8.1-glibc-2.17/c3f970a
+JEMALLOC_BASE=/mnt/gvfs/third-party2/jemalloc/fc8a13ca1fffa4d0765c716c5a0b49f0c107518f/master/gcc-4.8.1-glibc-2.17/8d31e51
+NUMA_BASE=/mnt/gvfs/third-party2/numa/17c514c4d102a25ca15f4558be564eeed76f4b6a/2.0.8/gcc-4.8.1-glibc-2.17/c3f970a
+LIBUNWIND_BASE=/mnt/gvfs/third-party2/libunwind/ad576de2a1ea560c4d3434304f0fc4e079bede42/trunk/gcc-4.8.1-glibc-2.17/675d945
+TBB_BASE=/mnt/gvfs/third-party2/tbb/9d9a554877d0c5bef330fe818ab7178806dd316a/4.0_update2/gcc-4.8.1-glibc-2.17/c3f970a
+KERNEL_HEADERS_BASE=/mnt/gvfs/third-party2/kernel-headers/7c111ff27e0c466235163f00f280a9d617c3d2ec/4.0.9-36_fbk5_2933_gd092e3f/gcc-4.8.1-glibc-2.17/da39a3e
+BINUTILS_BASE=/mnt/gvfs/third-party2/binutils/b7fd454c4b10c6a81015d4524ed06cdeab558490/2.26/centos6-native/da39a3e
+VALGRIND_BASE=/mnt/gvfs/third-party2/valgrind/d7f4d4d86674a57668e3a96f76f0e17dd0eb8765/3.8.1/gcc-4.8.1-glibc-2.17/c3f970a
+LUA_BASE=/mnt/gvfs/third-party2/lua/61e4abf5813bbc39bc4f548757ccfcadde175a48/5.2.3/centos6-native/730f94e
@@ -0,0 +1,20 @@
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+GCC_BASE=/mnt/gvfs/third-party2/gcc/7331085db891a2ef4a88a48a751d834e8d68f4cb/7.x/centos7-native/b2ef2b6
+CLANG_BASE=/mnt/gvfs/third-party2/llvm-fb/963d9aeda70cc4779885b1277484fe7544a04e3e/9.0.0/platform007/9e92d53/
+LIBGCC_BASE=/mnt/gvfs/third-party2/libgcc/6ace84e956873d53638c738b6f65f3f469cca74c/7.x/platform007/5620abc
+GLIBC_BASE=/mnt/gvfs/third-party2/glibc/192b0f42d63dcf6210d6ceae387b49af049e6e0c/2.26/platform007/f259413
+SNAPPY_BASE=/mnt/gvfs/third-party2/snappy/7f9bdaada18f59bc27ec2b0871eb8a6144343aef/1.1.3/platform007/ca4da3d
+ZLIB_BASE=/mnt/gvfs/third-party2/zlib/2d9f0b9a4274cc21f61272a9e89bdb859bce8f1f/1.2.8/platform007/ca4da3d
+BZIP2_BASE=/mnt/gvfs/third-party2/bzip2/dc49a21c5fceec6456a7a28a94dcd16690af1337/1.0.6/platform007/ca4da3d
+LZ4_BASE=/mnt/gvfs/third-party2/lz4/0f607f8fc442ea7d6b876931b1898bb573d5e5da/1.9.1/platform007/ca4da3d
+ZSTD_BASE=/mnt/gvfs/third-party2/zstd/ca22bc441a4eb709e9e0b1f9fec9750fed7b31c5/1.4.x/platform007/15a3614
+GFLAGS_BASE=/mnt/gvfs/third-party2/gflags/0b9929d2588991c65a57168bf88aff2db87c5d48/2.2.0/platform007/ca4da3d
+JEMALLOC_BASE=/mnt/gvfs/third-party2/jemalloc/c26f08f47ac35fc31da2633b7da92d6b863246eb/master/platform007/c26c002
+NUMA_BASE=/mnt/gvfs/third-party2/numa/3f3fb57a5ccc5fd21c66416c0b83e0aa76a05376/2.0.11/platform007/ca4da3d
+LIBUNWIND_BASE=/mnt/gvfs/third-party2/libunwind/40c73d874898b386a71847f1b99115d93822d11f/1.4/platform007/6f3e0a9
+TBB_BASE=/mnt/gvfs/third-party2/tbb/4ce8e8dba77cdbd81b75d6f0c32fd7a1b76a11ec/2018_U5/platform007/ca4da3d
+LIBURING_BASE=/mnt/gvfs/third-party2/liburing/79427253fd0d42677255aacfe6d13bfe63f752eb/20190828/platform007/ca4da3d
+KERNEL_HEADERS_BASE=/mnt/gvfs/third-party2/kernel-headers/fb251ecd2f5ae16f8671f7014c246e52a748fe0b/fb/platform007/da39a3e
+BINUTILS_BASE=/mnt/gvfs/third-party2/binutils/ab9f09bba370e7066cafd4eb59752db93f2e8312/2.29.1/platform007/15a3614
+VALGRIND_BASE=/mnt/gvfs/third-party2/valgrind/d42d152a15636529b0861ec493927200ebebca8e/3.15.0/platform007/ca4da3d
+LUA_BASE=/mnt/gvfs/third-party2/lua/f0cd714433206d5139df61659eb7b28b1dea6683/5.3.4/platform007/5007832
@@ -18,4 +18,4 @@ KERNEL_HEADERS_BASE=/mnt/gvfs/third-party2/kernel-headers/32b8a2407b634df3f8f948
 BINUTILS_BASE=/mnt/gvfs/third-party2/binutils/08634589372fa5f237bfd374e8c644a8364e78c1/2.32/platform009/ba86d1f/
 VALGRIND_BASE=/mnt/gvfs/third-party2/valgrind/6ae525939ad02e5e676855082fbbc7828dbafeac/3.15.0/platform009/7f3b187
 LUA_BASE=/mnt/gvfs/third-party2/lua/162efd9561a3d21f6869f4814011e9cf1b3ff4dc/5.3.4/platform009/a6271c4
-BENCHMARK_BASE=/mnt/gvfs/third-party2/benchmark/30bf49ad6414325e17f3425b0edcb64239427ae3/1.6.1/platform009/7f3b187
+BENCHMARK_BASE=/mnt/gvfs/third-party2/benchmark/bce8d9564eaf161700aa3a20b1051564acf555fb/1.5.5/platform009/7f3b187
@@ -0,0 +1,120 @@
+#!/bin/sh
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+#
+# Set environment variables so that we can compile rocksdb using
+# fbcode settings.  It uses the latest g++ compiler and also
+# uses jemalloc
+
+BASEDIR=`dirname $BASH_SOURCE`
+source "$BASEDIR/dependencies_4.8.1.sh"
+
+# location of libgcc
+LIBGCC_INCLUDE="$LIBGCC_BASE/include"
+LIBGCC_LIBS=" -L $LIBGCC_BASE/lib"
+
+# location of glibc
+GLIBC_INCLUDE="$GLIBC_BASE/include"
+GLIBC_LIBS=" -L $GLIBC_BASE/lib"
+
+# location of snappy headers and libraries
+SNAPPY_INCLUDE=" -I $SNAPPY_BASE/include"
+SNAPPY_LIBS=" $SNAPPY_BASE/lib/libsnappy.a"
+
+# location of zlib headers and libraries
+ZLIB_INCLUDE=" -I $ZLIB_BASE/include"
+ZLIB_LIBS=" $ZLIB_BASE/lib/libz.a"
+
+# location of bzip headers and libraries
+BZIP2_INCLUDE=" -I $BZIP2_BASE/include/"
+BZIP2_LIBS=" $BZIP2_BASE/lib/libbz2.a"
+
+LZ4_INCLUDE=" -I $LZ4_BASE/include"
+LZ4_LIBS=" $LZ4_BASE/lib/liblz4.a"
+
+ZSTD_INCLUDE=" -I $ZSTD_BASE/include"
+ZSTD_LIBS=" $ZSTD_BASE/lib/libzstd.a"
+
+# location of gflags headers and libraries
+GFLAGS_INCLUDE=" -I $GFLAGS_BASE/include/"
+GFLAGS_LIBS=" $GFLAGS_BASE/lib/libgflags.a"
+
+# location of jemalloc
+JEMALLOC_INCLUDE=" -I $JEMALLOC_BASE/include"
+JEMALLOC_LIB="$JEMALLOC_BASE/lib/libjemalloc.a"
+
+# location of numa
+NUMA_INCLUDE=" -I $NUMA_BASE/include/"
+NUMA_LIB=" $NUMA_BASE/lib/libnuma.a"
+
+# location of libunwind
+LIBUNWIND="$LIBUNWIND_BASE/lib/libunwind.a"
+
+# location of tbb
+TBB_INCLUDE=" -isystem $TBB_BASE/include/"
+TBB_LIBS="$TBB_BASE/lib/libtbb.a"
+
+test "$USE_SSE" || USE_SSE=1
+export USE_SSE
+test "$PORTABLE" || PORTABLE=1
+export PORTABLE
+
+BINUTILS="$BINUTILS_BASE/bin"
+AR="$BINUTILS/ar"
+
+DEPS_INCLUDE="$SNAPPY_INCLUDE $ZLIB_INCLUDE $BZIP2_INCLUDE $LZ4_INCLUDE $ZSTD_INCLUDE $GFLAGS_INCLUDE $NUMA_INCLUDE $TBB_INCLUDE"
+
+STDLIBS="-L $GCC_BASE/lib64"
+
+if [ -z "$USE_CLANG" ]; then
+  # gcc
+  CC="$GCC_BASE/bin/gcc"
+  CXX="$GCC_BASE/bin/g++"
+  CXX="$GCC_BASE/bin/gcc-ar"
+
+  CFLAGS="-B$BINUTILS/gold -m64 -mtune=generic"
+  CFLAGS+=" -isystem $GLIBC_INCLUDE"
+  CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  JEMALLOC=1
+else
+  # clang
+  CLANG_BIN="$CLANG_BASE/bin"
+  CLANG_LIB="$CLANG_BASE/lib"
+  CLANG_INCLUDE="$CLANG_LIB/clang/*/include"
+  CC="$CLANG_BIN/clang"
+  CXX="$CLANG_BIN/clang++"
+  AR="$CLANG_BIN/llvm-ar"
+
+  KERNEL_HEADERS_INCLUDE="$KERNEL_HEADERS_BASE/include/"
+
+  CFLAGS="-B$BINUTILS/gold -nostdinc -nostdlib"
+  CFLAGS+=" -isystem $LIBGCC_BASE/include/c++/4.8.1 "
+  CFLAGS+=" -isystem $LIBGCC_BASE/include/c++/4.8.1/x86_64-facebook-linux "
+  CFLAGS+=" -isystem $GLIBC_INCLUDE"
+  CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  CFLAGS+=" -isystem $CLANG_INCLUDE"
+  CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE/linux "
+  CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE "
+  CXXFLAGS="-nostdinc++"
+fi
+
+CFLAGS+=" $DEPS_INCLUDE"
+CFLAGS+=" -DROCKSDB_PLATFORM_POSIX -DROCKSDB_LIB_IO_POSIX -DROCKSDB_FALLOCATE_PRESENT -DROCKSDB_MALLOC_USABLE_SIZE -DROCKSDB_RANGESYNC_PRESENT -DROCKSDB_SCHED_GETCPU_PRESENT -DROCKSDB_SUPPORT_THREAD_LOCAL -DHAVE_SSE42"
+CFLAGS+=" -DSNAPPY -DGFLAGS=google -DZLIB -DBZIP2 -DLZ4 -DZSTD -DNUMA -DTBB"
+CXXFLAGS+=" $CFLAGS"
+
+EXEC_LDFLAGS=" $SNAPPY_LIBS $ZLIB_LIBS $BZIP2_LIBS $LZ4_LIBS $ZSTD_LIBS $GFLAGS_LIBS $NUMA_LIB $TBB_LIBS"
+EXEC_LDFLAGS+=" -Wl,--dynamic-linker,/usr/local/fbcode/gcc-4.8.1-glibc-2.17/lib/ld.so"
+EXEC_LDFLAGS+=" $LIBUNWIND"
+EXEC_LDFLAGS+=" -Wl,-rpath=/usr/local/fbcode/gcc-4.8.1-glibc-2.17/lib"
+# required by libtbb
+EXEC_LDFLAGS+=" -ldl"
+
+PLATFORM_LDFLAGS="$LIBGCC_LIBS $GLIBC_LIBS $STDLIBS -lgcc -lstdc++"
+
+EXEC_LDFLAGS_SHARED="$SNAPPY_LIBS $ZLIB_LIBS $BZIP2_LIBS $LZ4_LIBS $ZSTD_LIBS $GFLAGS_LIBS"
+
+VALGRIND_VER="$VALGRIND_BASE/bin/"
+
+LUA_PATH="$LUA_BASE"
+
+export CC CXX AR CFLAGS CXXFLAGS EXEC_LDFLAGS EXEC_LDFLAGS_SHARED VALGRIND_VER JEMALLOC_LIB JEMALLOC_INCLUDE LUA_PATH
@@ -0,0 +1,170 @@
+#!/bin/sh
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+#
+# Set environment variables so that we can compile rocksdb using
+# fbcode settings.  It uses the latest g++ and clang compilers and also
+# uses jemalloc
+# Environment variables that change the behavior of this script:
+# PIC_BUILD -- if true, it will only take pic versions of libraries from fbcode. libraries that don't have pic variant will not be included
+
+
+BASEDIR=`dirname $BASH_SOURCE`
+source "$BASEDIR/dependencies_platform007.sh"
+
+CFLAGS=""
+
+# libgcc
+LIBGCC_INCLUDE="$LIBGCC_BASE/include/c++/7.3.0"
+LIBGCC_LIBS=" -L $LIBGCC_BASE/lib"
+
+# glibc
+GLIBC_INCLUDE="$GLIBC_BASE/include"
+GLIBC_LIBS=" -L $GLIBC_BASE/lib"
+
+# snappy
+SNAPPY_INCLUDE=" -I $SNAPPY_BASE/include/"
+if test -z $PIC_BUILD; then
+  SNAPPY_LIBS=" $SNAPPY_BASE/lib/libsnappy.a"
+else
+  SNAPPY_LIBS=" $SNAPPY_BASE/lib/libsnappy_pic.a"
+fi
+CFLAGS+=" -DSNAPPY"
+
+if test -z $PIC_BUILD; then
+  # location of zlib headers and libraries
+  ZLIB_INCLUDE=" -I $ZLIB_BASE/include/"
+  ZLIB_LIBS=" $ZLIB_BASE/lib/libz.a"
+  CFLAGS+=" -DZLIB"
+
+  # location of bzip headers and libraries
+  BZIP_INCLUDE=" -I $BZIP2_BASE/include/"
+  BZIP_LIBS=" $BZIP2_BASE/lib/libbz2.a"
+  CFLAGS+=" -DBZIP2"
+
+  LZ4_INCLUDE=" -I $LZ4_BASE/include/"
+  LZ4_LIBS=" $LZ4_BASE/lib/liblz4.a"
+  CFLAGS+=" -DLZ4"
+fi
+
+ZSTD_INCLUDE=" -I $ZSTD_BASE/include/"
+if test -z $PIC_BUILD; then
+  ZSTD_LIBS=" $ZSTD_BASE/lib/libzstd.a"
+else
+  ZSTD_LIBS=" $ZSTD_BASE/lib/libzstd_pic.a"
+fi
+CFLAGS+=" -DZSTD"
+
+# location of gflags headers and libraries
+GFLAGS_INCLUDE=" -I $GFLAGS_BASE/include/"
+if test -z $PIC_BUILD; then
+  GFLAGS_LIBS=" $GFLAGS_BASE/lib/libgflags.a"
+else
+  GFLAGS_LIBS=" $GFLAGS_BASE/lib/libgflags_pic.a"
+fi
+CFLAGS+=" -DGFLAGS=gflags"
+
+# location of jemalloc
+JEMALLOC_INCLUDE=" -I $JEMALLOC_BASE/include/"
+JEMALLOC_LIB=" $JEMALLOC_BASE/lib/libjemalloc.a"
+
+if test -z $PIC_BUILD; then
+  # location of numa
+  NUMA_INCLUDE=" -I $NUMA_BASE/include/"
+  NUMA_LIB=" $NUMA_BASE/lib/libnuma.a"
+  CFLAGS+=" -DNUMA"
+
+  # location of libunwind
+  LIBUNWIND="$LIBUNWIND_BASE/lib/libunwind.a"
+fi
+
+# location of TBB
+TBB_INCLUDE=" -isystem $TBB_BASE/include/"
+if test -z $PIC_BUILD; then
+  TBB_LIBS="$TBB_BASE/lib/libtbb.a"
+else
+  TBB_LIBS="$TBB_BASE/lib/libtbb_pic.a"
+fi
+CFLAGS+=" -DTBB"
+
+# location of LIBURING
+LIBURING_INCLUDE=" -isystem $LIBURING_BASE/include/"
+if test -z $PIC_BUILD; then
+  LIBURING_LIBS="$LIBURING_BASE/lib/liburing.a"
+else
+  LIBURING_LIBS="$LIBURING_BASE/lib/liburing_pic.a"
+fi
+CFLAGS+=" -DLIBURING"
+
+test "$USE_SSE" || USE_SSE=1
+export USE_SSE
+test "$PORTABLE" || PORTABLE=1
+export PORTABLE
+
+BINUTILS="$BINUTILS_BASE/bin"
+AR="$BINUTILS/ar"
+
+DEPS_INCLUDE="$SNAPPY_INCLUDE $ZLIB_INCLUDE $BZIP_INCLUDE $LZ4_INCLUDE $ZSTD_INCLUDE $GFLAGS_INCLUDE $NUMA_INCLUDE $TBB_INCLUDE $LIBURING_INCLUDE"
+
+STDLIBS="-L $GCC_BASE/lib64"
+
+CLANG_BIN="$CLANG_BASE/bin"
+CLANG_LIB="$CLANG_BASE/lib"
+CLANG_SRC="$CLANG_BASE/../../src"
+
+CLANG_ANALYZER="$CLANG_BIN/clang++"
+CLANG_SCAN_BUILD="$CLANG_SRC/llvm/tools/clang/tools/scan-build/bin/scan-build"
+
+if [ -z "$USE_CLANG" ]; then
+  # gcc
+  CC="$GCC_BASE/bin/gcc"
+  CXX="$GCC_BASE/bin/g++"
+  AR="$GCC_BASE/bin/gcc-ar"
+
+  CFLAGS+=" -B$BINUTILS/gold"
+  CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  CFLAGS+=" -isystem $GLIBC_INCLUDE"
+  JEMALLOC=1
+else
+  # clang
+  CLANG_INCLUDE="$CLANG_LIB/clang/stable/include"
+  CC="$CLANG_BIN/clang"
+  CXX="$CLANG_BIN/clang++"
+  AR="$CLANG_BIN/llvm-ar"
+
+  KERNEL_HEADERS_INCLUDE="$KERNEL_HEADERS_BASE/include"
+
+  CFLAGS+=" -B$BINUTILS/gold -nostdinc -nostdlib"
+  CFLAGS+=" -isystem $LIBGCC_BASE/include/c++/7.x "
+  CFLAGS+=" -isystem $LIBGCC_BASE/include/c++/7.x/x86_64-facebook-linux "
+  CFLAGS+=" -isystem $GLIBC_INCLUDE"
+  CFLAGS+=" -isystem $LIBGCC_INCLUDE"
+  CFLAGS+=" -isystem $CLANG_INCLUDE"
+  CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE/linux "
+  CFLAGS+=" -isystem $KERNEL_HEADERS_INCLUDE "
+  CFLAGS+=" -Wno-expansion-to-defined "
+  CXXFLAGS="-nostdinc++"
+fi
+
+CFLAGS+=" $DEPS_INCLUDE"
+CFLAGS+=" -DROCKSDB_PLATFORM_POSIX -DROCKSDB_LIB_IO_POSIX -DROCKSDB_FALLOCATE_PRESENT -DROCKSDB_MALLOC_USABLE_SIZE -DROCKSDB_RANGESYNC_PRESENT -DROCKSDB_SCHED_GETCPU_PRESENT -DROCKSDB_SUPPORT_THREAD_LOCAL -DHAVE_SSE42 -DROCKSDB_IOURING_PRESENT"
+CXXFLAGS+=" $CFLAGS"
+
+EXEC_LDFLAGS=" $SNAPPY_LIBS $ZLIB_LIBS $BZIP_LIBS $LZ4_LIBS $ZSTD_LIBS $GFLAGS_LIBS $NUMA_LIB $TBB_LIBS $LIBURING_LIBS"
+EXEC_LDFLAGS+=" -B$BINUTILS/gold"
+EXEC_LDFLAGS+=" -Wl,--dynamic-linker,/usr/local/fbcode/platform007/lib/ld.so"
+EXEC_LDFLAGS+=" $LIBUNWIND"
+EXEC_LDFLAGS+=" -Wl,-rpath=/usr/local/fbcode/platform007/lib"
+# required by libtbb
+EXEC_LDFLAGS+=" -ldl"
+
+PLATFORM_LDFLAGS="$LIBGCC_LIBS $GLIBC_LIBS $STDLIBS -lgcc -lstdc++"
+
+EXEC_LDFLAGS_SHARED="$SNAPPY_LIBS $ZLIB_LIBS $BZIP_LIBS $LZ4_LIBS $ZSTD_LIBS $GFLAGS_LIBS $TBB_LIBS $LIBURING_LIBS"
+
+VALGRIND_VER="$VALGRIND_BASE/bin/"
+
+# lua not supported because it's on track for deprecation, I think
+LUA_PATH=
+LUA_LIB=
+
+export CC CXX AR CFLAGS CXXFLAGS EXEC_LDFLAGS EXEC_LDFLAGS_SHARED VALGRIND_VER JEMALLOC_LIB JEMALLOC_INCLUDE CLANG_ANALYZER CLANG_SCAN_BUILD LUA_PATH LUA_LIB
@@ -0,0 +1,209 @@
+#!/usr/bin/env python2.7
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+import argparse
+import commands
+import subprocess
+import sys
+import re
+import os
+import time
+
+
+#
+# Simple logger
+#
+
+class Log:
+
+    def __init__(self, filename):
+        self.filename = filename
+        self.f = open(self.filename, 'w+', 0)
+
+    def caption(self, str):
+        line = "\n##### %s #####\n" % str
+        if self.f:
+            self.f.write("%s \n" % line)
+        else:
+            print(line)
+
+    def error(self, str):
+        data = "\n\n##### ERROR ##### %s" % str
+        if self.f:
+            self.f.write("%s \n" % data)
+        else:
+            print(data)
+
+    def log(self, str):
+        if self.f:
+            self.f.write("%s \n" % str)
+        else:
+            print(str)
+
+#
+# Shell Environment
+#
+
+
+class Env(object):
+
+    def __init__(self, logfile, tests):
+        self.tests = tests
+        self.log = Log(logfile)
+
+    def shell(self, cmd, path=os.getcwd()):
+        if path:
+            os.chdir(path)
+
+        self.log.log("==== shell session ===========================")
+        self.log.log("%s> %s" % (path, cmd))
+        status = subprocess.call("cd %s; %s" % (path, cmd), shell=True,
+                                 stdout=self.log.f, stderr=self.log.f)
+        self.log.log("status = %s" % status)
+        self.log.log("============================================== \n\n")
+        return status
+
+    def GetOutput(self, cmd, path=os.getcwd()):
+        if path:
+            os.chdir(path)
+
+        self.log.log("==== shell session ===========================")
+        self.log.log("%s> %s" % (path, cmd))
+        status, out = commands.getstatusoutput(cmd)
+        self.log.log("status = %s" % status)
+        self.log.log("out = %s" % out)
+        self.log.log("============================================== \n\n")
+        return status, out
+
+#
+# Pre-commit checker
+#
+
+
+class PreCommitChecker(Env):
+
+    def __init__(self, args):
+        Env.__init__(self, args.logfile, args.tests)
+        self.ignore_failure = args.ignore_failure
+
+    #
+    #   Get commands for a given job from the determinator file
+    #
+    def get_commands(self, test):
+        status, out = self.GetOutput(
+            "RATIO=1 build_tools/rocksdb-lego-determinator %s" % test, ".")
+        return status, out
+
+    #
+    # Run a specific CI job
+    #
+    def run_test(self, test):
+        self.log.caption("Running test %s locally" % test)
+
+        # get commands for the CI job determinator
+        status, cmds = self.get_commands(test)
+        if status != 0:
+            self.log.error("Error getting commands for test %s" % test)
+            return False
+
+        # Parse the JSON to extract the commands to run
+        cmds = re.findall("'shell':'([^\']*)'", cmds)
+
+        if len(cmds) == 0:
+            self.log.log("No commands found")
+            return False
+
+        # Run commands
+        for cmd in cmds:
+            # Replace J=<..> with the local environment variable
+            if "J" in os.environ:
+                cmd = cmd.replace("J=1", "J=%s" % os.environ["J"])
+                cmd = cmd.replace("make ", "make -j%s " % os.environ["J"])
+            # Run the command
+            status = self.shell(cmd, ".")
+            if status != 0:
+                self.log.error("Error running command %s for test %s"
+                               % (cmd, test))
+                return False
+
+        return True
+
+    #
+    # Run specified CI jobs
+    #
+    def run_tests(self):
+        if not self.tests:
+            self.log.error("Invalid args. Please provide tests")
+            return False
+
+        self.print_separator()
+        self.print_row("TEST", "RESULT")
+        self.print_separator()
+
+        result = True
+        for test in self.tests:
+            start_time = time.time()
+            self.print_test(test)
+            result = self.run_test(test)
+            elapsed_min = (time.time() - start_time) / 60
+            if not result:
+                self.log.error("Error running test %s" % test)
+                self.print_result("FAIL (%dm)" % elapsed_min)
+                if not self.ignore_failure:
+                    return False
+                result = False
+            else:
+                self.print_result("PASS (%dm)" % elapsed_min)
+
+        self.print_separator()
+        return result
+
+    #
+    # Print a line
+    #
+    def print_separator(self):
+        print("".ljust(60, "-"))
+
+    #
+    # Print two colums
+    #
+    def print_row(self, c0, c1):
+        print("%s%s" % (c0.ljust(40), c1.ljust(20)))
+
+    def print_test(self, test):
+        print(test.ljust(40), end="")
+        sys.stdout.flush()
+
+    def print_result(self, result):
+        print(result.ljust(20))
+
+#
+# Main
+#
+parser = argparse.ArgumentParser(description='RocksDB pre-commit checker.')
+
+# --log <logfile>
+parser.add_argument('--logfile', default='/tmp/precommit-check.log',
+                    help='Log file. Default is /tmp/precommit-check.log')
+# --ignore_failure
+parser.add_argument('--ignore_failure', action='store_true', default=False,
+                    help='Stop when an error occurs')
+# <test ....>
+parser.add_argument('tests', nargs='+',
+                    help='CI test(s) to run. e.g: unit punit asan tsan ubsan')
+
+args = parser.parse_args()
+checker = PreCommitChecker(args)
+
+print("Please follow log %s" % checker.log.filename)
+
+if not checker.run_tests():
+    print("Error running tests. Please check log file %s"
+          % checker.log.filename)
+    sys.exit(1)
+
+sys.exit(0)
@@ -42,7 +42,7 @@ $RunOnly.Add("c_test") | Out-Null
 $RunOnly.Add("compact_on_deletion_collector_test") | Out-Null
 $RunOnly.Add("merge_test") | Out-Null
 $RunOnly.Add("stringappend_test") | Out-Null # Apparently incorrectly written
-$RunOnly.Add("backup_engine_test") | Out-Null # Disabled
+$RunOnly.Add("backupable_db_test") | Out-Null # Disabled
 $RunOnly.Add("timer_queue_test") | Out-Null # Not a gtest

 if($RunAll -and $SuiteRun -ne "") {
@@ -491,3 +491,5 @@ if(!$script:success) {
 }

 exit 0
+
+
@@ -21,7 +21,6 @@ std::array<const char*, kNumCacheEntryRoles> kCacheEntryRoleToCamelString{{
    "WriteBuffer",
    "CompressionDictionaryBuildingBuffer",
    "FilterConstruction",
-    "BlockBasedTableReader",
    "Misc",
 }};

@@ -35,7 +34,6 @@ std::array<const char*, kNumCacheEntryRoles> kCacheEntryRoleToHyphenString{{
    "write-buffer",
    "compression-dictionary-building-buffer",
    "filter-construction",
-    "block-based-table-reader",
    "misc",
 }};

@@ -39,9 +39,6 @@ enum class CacheEntryRole {
  // Filter reservations to account for
  // (new) bloom and ribbon filter construction's memory usage
  kFilterConstruction,
-  // BlockBasedTableReader reservations to account for
-  // its memory usage
-  kBlockBasedTableReader,
  // Default bucket, for miscellaneous cache entries. Do not use for
  // entries that could potentially add up to large usage.
  kMisc,
@@ -17,30 +17,12 @@
 #include "rocksdb/cache.h"
 #include "rocksdb/slice.h"
 #include "rocksdb/status.h"
-#include "table/block_based/reader_common.h"
+#include "table/block_based/block_based_table_reader.h"
 #include "util/coding.h"

 namespace ROCKSDB_NAMESPACE {
-
-template <CacheEntryRole R>
-CacheReservationManagerImpl<R>::CacheReservationHandle::CacheReservationHandle(
-    std::size_t incremental_memory_used,
-    std::shared_ptr<CacheReservationManagerImpl> cache_res_mgr)
-    : incremental_memory_used_(incremental_memory_used) {
-  assert(cache_res_mgr);
-  cache_res_mgr_ = cache_res_mgr;
-}
-
-template <CacheEntryRole R>
-CacheReservationManagerImpl<
-    R>::CacheReservationHandle::~CacheReservationHandle() {
-  Status s = cache_res_mgr_->ReleaseCacheReservation(incremental_memory_used_);
-  s.PermitUncheckedError();
-}
-
-template <CacheEntryRole R>
-CacheReservationManagerImpl<R>::CacheReservationManagerImpl(
-    std::shared_ptr<Cache> cache, bool delayed_decrease)
+CacheReservationManager::CacheReservationManager(std::shared_ptr<Cache> cache,
+                                                 bool delayed_decrease)
    : delayed_decrease_(delayed_decrease),
      cache_allocated_size_(0),
      memory_used_(0) {
@@ -48,15 +30,14 @@ CacheReservationManagerImpl<R>::CacheReservationManagerImpl(
  cache_ = cache;
 }

-template <CacheEntryRole R>
-CacheReservationManagerImpl<R>::~CacheReservationManagerImpl() {
+CacheReservationManager::~CacheReservationManager() {
  for (auto* handle : dummy_handles_) {
    cache_->Release(handle, true);
  }
 }

 template <CacheEntryRole R>
-Status CacheReservationManagerImpl<R>::UpdateCacheReservation(
+Status CacheReservationManager::UpdateCacheReservation(
    std::size_t new_mem_used) {
  memory_used_ = new_mem_used;
  std::size_t cur_cache_allocated_size =
@@ -64,7 +45,7 @@ Status CacheReservationManagerImpl<R>::UpdateCacheReservation(
  if (new_mem_used == cur_cache_allocated_size) {
    return Status::OK();
  } else if (new_mem_used > cur_cache_allocated_size) {
-    Status s = IncreaseCacheReservation(new_mem_used);
+    Status s = IncreaseCacheReservation<R>(new_mem_used);
    return s;
  } else {
    // In delayed decrease mode, we don't decrease cache reservation
@@ -85,32 +66,41 @@ Status CacheReservationManagerImpl<R>::UpdateCacheReservation(
  }
 }

+// Explicitly instantiate templates for "CacheEntryRole" values we use.
+// This makes it possible to keep the template definitions in the .cc file.
+template Status CacheReservationManager::UpdateCacheReservation<
+    CacheEntryRole::kWriteBuffer>(std::size_t new_mem_used);
+template Status CacheReservationManager::UpdateCacheReservation<
+    CacheEntryRole::kCompressionDictionaryBuildingBuffer>(
+    std::size_t new_mem_used);
+// For cache reservation manager unit tests
+template Status CacheReservationManager::UpdateCacheReservation<
+    CacheEntryRole::kMisc>(std::size_t new_mem_used);
+
 template <CacheEntryRole R>
-Status CacheReservationManagerImpl<R>::MakeCacheReservation(
+Status CacheReservationManager::MakeCacheReservation(
    std::size_t incremental_memory_used,
-    std::unique_ptr<CacheReservationManager::CacheReservationHandle>* handle) {
-  assert(handle);
+    std::unique_ptr<CacheReservationHandle<R>>* handle) {
+  assert(handle != nullptr);
  Status s =
-      UpdateCacheReservation(GetTotalMemoryUsed() + incremental_memory_used);
-  (*handle).reset(new CacheReservationManagerImpl::CacheReservationHandle(
-      incremental_memory_used,
-      std::enable_shared_from_this<
-          CacheReservationManagerImpl<R>>::shared_from_this()));
+      UpdateCacheReservation<R>(GetTotalMemoryUsed() + incremental_memory_used);
+  (*handle).reset(new CacheReservationHandle<R>(incremental_memory_used,
+                                                shared_from_this()));
  return s;
 }

-template <CacheEntryRole R>
-Status CacheReservationManagerImpl<R>::ReleaseCacheReservation(
-    std::size_t incremental_memory_used) {
-  assert(GetTotalMemoryUsed() >= incremental_memory_used);
-  std::size_t updated_total_mem_used =
-      GetTotalMemoryUsed() - incremental_memory_used;
-  Status s = UpdateCacheReservation(updated_total_mem_used);
-  return s;
-}
+template Status
+CacheReservationManager::MakeCacheReservation<CacheEntryRole::kMisc>(
+    std::size_t incremental_memory_used,
+    std::unique_ptr<CacheReservationHandle<CacheEntryRole::kMisc>>* handle);
+template Status CacheReservationManager::MakeCacheReservation<
+    CacheEntryRole::kFilterConstruction>(
+    std::size_t incremental_memory_used,
+    std::unique_ptr<
+        CacheReservationHandle<CacheEntryRole::kFilterConstruction>>* handle);

 template <CacheEntryRole R>
-Status CacheReservationManagerImpl<R>::IncreaseCacheReservation(
+Status CacheReservationManager::IncreaseCacheReservation(
    std::size_t new_mem_used) {
  Status return_status = Status::OK();
  while (new_mem_used > cache_allocated_size_.load(std::memory_order_relaxed)) {
@@ -128,8 +118,7 @@ Status CacheReservationManagerImpl<R>::IncreaseCacheReservation(
  return return_status;
 }

-template <CacheEntryRole R>
-Status CacheReservationManagerImpl<R>::DecreaseCacheReservation(
+Status CacheReservationManager::DecreaseCacheReservation(
    std::size_t new_mem_used) {
  Status return_status = Status::OK();

@@ -148,18 +137,15 @@ Status CacheReservationManagerImpl<R>::DecreaseCacheReservation(
  return return_status;
 }

-template <CacheEntryRole R>
-std::size_t CacheReservationManagerImpl<R>::GetTotalReservedCacheSize() {
+std::size_t CacheReservationManager::GetTotalReservedCacheSize() {
  return cache_allocated_size_.load(std::memory_order_relaxed);
 }

-template <CacheEntryRole R>
-std::size_t CacheReservationManagerImpl<R>::GetTotalMemoryUsed() {
+std::size_t CacheReservationManager::GetTotalMemoryUsed() {
  return memory_used_;
 }

-template <CacheEntryRole R>
-Slice CacheReservationManagerImpl<R>::GetNextCacheKey() {
+Slice CacheReservationManager::GetNextCacheKey() {
  // Calling this function will have the side-effect of changing the
  // underlying cache_key_ that is shared among other keys generated from this
  // fucntion. Therefore please make sure the previous keys are saved/copied
@@ -169,15 +155,34 @@ Slice CacheReservationManagerImpl<R>::GetNextCacheKey() {
 }

 template <CacheEntryRole R>
-Cache::DeleterFn CacheReservationManagerImpl<R>::TEST_GetNoopDeleterForRole() {
+Cache::DeleterFn CacheReservationManager::TEST_GetNoopDeleterForRole() {
  return GetNoopDeleterForRole<R>();
 }

-template class CacheReservationManagerImpl<
-    CacheEntryRole::kBlockBasedTableReader>;
-template class CacheReservationManagerImpl<
-    CacheEntryRole::kCompressionDictionaryBuildingBuffer>;
-template class CacheReservationManagerImpl<CacheEntryRole::kFilterConstruction>;
-template class CacheReservationManagerImpl<CacheEntryRole::kMisc>;
-template class CacheReservationManagerImpl<CacheEntryRole::kWriteBuffer>;
+template Cache::DeleterFn CacheReservationManager::TEST_GetNoopDeleterForRole<
+    CacheEntryRole::kFilterConstruction>();
+
+template <CacheEntryRole R>
+CacheReservationHandle<R>::CacheReservationHandle(
+    std::size_t incremental_memory_used,
+    std::shared_ptr<CacheReservationManager> cache_res_mgr)
+    : incremental_memory_used_(incremental_memory_used) {
+  assert(cache_res_mgr != nullptr);
+  cache_res_mgr_ = cache_res_mgr;
+}
+
+template <CacheEntryRole R>
+CacheReservationHandle<R>::~CacheReservationHandle() {
+  assert(cache_res_mgr_ != nullptr);
+  assert(cache_res_mgr_->GetTotalMemoryUsed() >= incremental_memory_used_);
+
+  Status s = cache_res_mgr_->UpdateCacheReservation<R>(
+      cache_res_mgr_->GetTotalMemoryUsed() - incremental_memory_used_);
+  s.PermitUncheckedError();
+}
+
+// Explicitly instantiate templates for "CacheEntryRole" values we use.
+// This makes it possible to keep the template definitions in the .cc file.
+template class CacheReservationHandle<CacheEntryRole::kMisc>;
+template class CacheReservationHandle<CacheEntryRole::kFilterConstruction>;
 }  // namespace ROCKSDB_NAMESPACE
@@ -13,90 +13,54 @@
 #include <cstddef>
 #include <cstdint>
 #include <memory>
-#include <mutex>
 #include <vector>

 #include "cache/cache_entry_roles.h"
-#include "cache/cache_key.h"
 #include "rocksdb/cache.h"
 #include "rocksdb/slice.h"
 #include "rocksdb/status.h"
+#include "table/block_based/block_based_table_reader.h"
 #include "util/coding.h"

 namespace ROCKSDB_NAMESPACE {
-// CacheReservationManager is an interface for reserving cache space for the
-// memory used
-class CacheReservationManager {
- public:
-  // CacheReservationHandle is for managing the lifetime of a cache reservation
-  // for an incremental amount of memory used (i.e, incremental_memory_used)
-  class CacheReservationHandle {
-   public:
-    virtual ~CacheReservationHandle() {}
-  };
-  virtual ~CacheReservationManager() {}
-  virtual Status UpdateCacheReservation(std::size_t new_memory_used) = 0;
-  virtual Status MakeCacheReservation(
-      std::size_t incremental_memory_used,
-      std::unique_ptr<CacheReservationManager::CacheReservationHandle>
-          *handle) = 0;
-  virtual std::size_t GetTotalReservedCacheSize() = 0;
-  virtual std::size_t GetTotalMemoryUsed() = 0;
-};

-// CacheReservationManagerImpl implements interface CacheReservationManager
-// for reserving cache space for the memory used by inserting/releasing dummy
-// entries in the cache.
+template <CacheEntryRole R>
+class CacheReservationHandle;
+
+// CacheReservationManager is for reserving cache space for the memory used
+// through inserting/releasing dummy entries in the cache.
 //
 // This class is NOT thread-safe, except that GetTotalReservedCacheSize()
 // can be called without external synchronization.
-template <CacheEntryRole R>
-class CacheReservationManagerImpl
-    : public CacheReservationManager,
-      public std::enable_shared_from_this<CacheReservationManagerImpl<R>> {
+class CacheReservationManager
+    : public std::enable_shared_from_this<CacheReservationManager> {
 public:
-  class CacheReservationHandle
-      : public CacheReservationManager::CacheReservationHandle {
-   public:
-    CacheReservationHandle(
-        std::size_t incremental_memory_used,
-        std::shared_ptr<CacheReservationManagerImpl> cache_res_mgr);
-    ~CacheReservationHandle() override;
-
-   private:
-    std::size_t incremental_memory_used_;
-    std::shared_ptr<CacheReservationManagerImpl> cache_res_mgr_;
-  };
-
-  // Construct a CacheReservationManagerImpl
+  // Construct a CacheReservationManager
  // @param cache The cache where dummy entries are inserted and released for
  // reserving cache space
  // @param delayed_decrease If set true, then dummy entries won't be released
-  //                         immediately when memory usage decreases.
+  // immediately when memory usage decreases.
  //                         Instead, it will be released when the memory usage
  //                         decreases to 3/4 of what we have reserved so far.
  //                         This is for saving some future dummy entry
  //                         insertion when memory usage increases are likely to
  //                         happen in the near future.
-  //
-  // REQUIRED: cache is not nullptr
-  explicit CacheReservationManagerImpl(std::shared_ptr<Cache> cache,
-                                       bool delayed_decrease = false);
+  explicit CacheReservationManager(std::shared_ptr<Cache> cache,
+                                   bool delayed_decrease = false);

  // no copy constructor, copy assignment, move constructor, move assignment
-  CacheReservationManagerImpl(const CacheReservationManagerImpl &) = delete;
-  CacheReservationManagerImpl &operator=(const CacheReservationManagerImpl &) =
-      delete;
-  CacheReservationManagerImpl(CacheReservationManagerImpl &&) = delete;
-  CacheReservationManagerImpl &operator=(CacheReservationManagerImpl &&) =
-      delete;
+  CacheReservationManager(const CacheReservationManager &) = delete;
+  CacheReservationManager &operator=(const CacheReservationManager &) = delete;
+  CacheReservationManager(CacheReservationManager &&) = delete;
+  CacheReservationManager &operator=(CacheReservationManager &&) = delete;

-  ~CacheReservationManagerImpl() override;
+  ~CacheReservationManager();

-  // One of the two ways of reserving/releasing cache space,
-  // see MakeCacheReservation() for the other.
-  //
-  // Use ONLY one of these two ways to prevent unexpected behavior.
+  template <CacheEntryRole R>
+
+  // One of the two ways of reserving/releasing cache,
+  // see CacheReservationManager::MakeCacheReservation() for the other.
+  // Use ONLY one of them to prevent unexpected behavior.
  //
  // Insert and release dummy entries in the cache to
  // match the size of total dummy entries with the least multiple of
@@ -126,13 +90,11 @@ class CacheReservationManagerImpl
  //         Otherwise, it returns the first non-ok status;
  //         On releasing dummy entries, it always returns Status::OK().
  //         On keeping dummy entries the same, it always returns Status::OK().
-  Status UpdateCacheReservation(std::size_t new_memory_used) override;
+  Status UpdateCacheReservation(std::size_t new_memory_used);

-  // One of the two ways of reserving cache space and releasing is done through
-  // destruction of CacheReservationHandle.
-  // See UpdateCacheReservation() for the other way.
-  //
-  // Use ONLY one of these two ways to prevent unexpected behavior.
+  // One of the two ways of reserving/releasing cache,
+  // see CacheReservationManager::UpdateCacheReservation() for the other.
+  // Use ONLY one of them to prevent unexpected behavior.
  //
  // Insert dummy entries in the cache for the incremental memory usage
  // to match the size of total dummy entries with the least multiple of
@@ -156,19 +118,21 @@ class CacheReservationManagerImpl
  //        calling MakeCacheReservation() is needed if you want
  //        GetTotalMemoryUsed() indeed returns the latest memory used.
  //
-  // @param handle An pointer to std::unique_ptr<CacheReservationHandle> that
-  //        manages the lifetime of the cache reservation represented by the
-  //        handle.
+  // @param handle An pointer to std::unique_ptr<CacheReservationHandle<R>> that
+  //        manages the lifetime of the handle and its cache reservation.
  //
  // @return It returns Status::OK() if all dummy
  //         entry insertions succeed.
  //         Otherwise, it returns the first non-ok status;
  //
  // REQUIRES: handle != nullptr
+  // REQUIRES: The CacheReservationManager object is NOT managed by
+  //           std::unique_ptr as CacheReservationHandle needs to
+  //           shares ownership to the CacheReservationManager object.
+  template <CacheEntryRole R>
  Status MakeCacheReservation(
      std::size_t incremental_memory_used,
-      std::unique_ptr<CacheReservationManager::CacheReservationHandle> *handle)
-      override;
+      std::unique_ptr<CacheReservationHandle<R>> *handle);

  // Return the size of the cache (which is a multiple of kSizeDummyEntry)
  // successfully reserved by calling UpdateCacheReservation().
@@ -178,25 +142,25 @@ class CacheReservationManagerImpl
  // smaller number than the actual reserved cache size due to
  // the returned number will always be a multiple of kSizeDummyEntry
  // and cache full might happen in the middle of inserting a dummy entry.
-  std::size_t GetTotalReservedCacheSize() override;
+  std::size_t GetTotalReservedCacheSize();

  // Return the latest total memory used indicated by the most recent call of
  // UpdateCacheReservation(std::size_t new_memory_used);
-  std::size_t GetTotalMemoryUsed() override;
+  std::size_t GetTotalMemoryUsed();

  static constexpr std::size_t GetDummyEntrySize() { return kSizeDummyEntry; }

  // For testing only - it is to help ensure the NoopDeleterForRole<R>
-  // accessed from CacheReservationManagerImpl and the one accessed from the
-  // test are from the same translation units
+  // accessed from CacheReservationManager and the one accessed from the test
+  // are from the same translation units
+  template <CacheEntryRole R>
  static Cache::DeleterFn TEST_GetNoopDeleterForRole();

 private:
  static constexpr std::size_t kSizeDummyEntry = 256 * 1024;

  Slice GetNextCacheKey();
-
-  Status ReleaseCacheReservation(std::size_t incremental_memory_used);
+  template <CacheEntryRole R>
  Status IncreaseCacheReservation(std::size_t new_mem_used);
  Status DecreaseCacheReservation(std::size_t new_mem_used);

@@ -208,81 +172,20 @@ class CacheReservationManagerImpl
  CacheKey cache_key_;
 };

-class ConcurrentCacheReservationManager
-    : public CacheReservationManager,
-      public std::enable_shared_from_this<ConcurrentCacheReservationManager> {
+// CacheReservationHandle is for managing the lifetime of a cache reservation
+// This class is NOT thread-safe
+template <CacheEntryRole R>
+class CacheReservationHandle {
 public:
-  class CacheReservationHandle
-      : public CacheReservationManager::CacheReservationHandle {
-   public:
-    CacheReservationHandle(
-        std::shared_ptr<ConcurrentCacheReservationManager> cache_res_mgr,
-        std::unique_ptr<CacheReservationManager::CacheReservationHandle>
-            cache_res_handle) {
-      assert(cache_res_mgr && cache_res_handle);
-      cache_res_mgr_ = cache_res_mgr;
-      cache_res_handle_ = std::move(cache_res_handle);
-    }
-
-    ~CacheReservationHandle() override {
-      std::lock_guard<std::mutex> lock(cache_res_mgr_->cache_res_mgr_mu_);
-      cache_res_handle_.reset();
-    }
-
-   private:
-    std::shared_ptr<ConcurrentCacheReservationManager> cache_res_mgr_;
-    std::unique_ptr<CacheReservationManager::CacheReservationHandle>
-        cache_res_handle_;
-  };
-
-  explicit ConcurrentCacheReservationManager(
-      std::shared_ptr<CacheReservationManager> cache_res_mgr) {
-    cache_res_mgr_ = std::move(cache_res_mgr);
-  }
-  ConcurrentCacheReservationManager(const ConcurrentCacheReservationManager &) =
-      delete;
-  ConcurrentCacheReservationManager &operator=(
-      const ConcurrentCacheReservationManager &) = delete;
-  ConcurrentCacheReservationManager(ConcurrentCacheReservationManager &&) =
-      delete;
-  ConcurrentCacheReservationManager &operator=(
-      ConcurrentCacheReservationManager &&) = delete;
-
-  ~ConcurrentCacheReservationManager() override {}
-
-  inline Status UpdateCacheReservation(std::size_t new_memory_used) override {
-    std::lock_guard<std::mutex> lock(cache_res_mgr_mu_);
-    return cache_res_mgr_->UpdateCacheReservation(new_memory_used);
-  }
-  inline Status MakeCacheReservation(
+  // REQUIRES: cache_res_mgr != nullptr
+  explicit CacheReservationHandle(
      std::size_t incremental_memory_used,
-      std::unique_ptr<CacheReservationManager::CacheReservationHandle> *handle)
-      override {
-    std::unique_ptr<CacheReservationManager::CacheReservationHandle>
-        wrapped_handle;
-    Status s;
-    {
-      std::lock_guard<std::mutex> lock(cache_res_mgr_mu_);
-      s = cache_res_mgr_->MakeCacheReservation(incremental_memory_used,
-                                               &wrapped_handle);
-    }
-    (*handle).reset(
-        new ConcurrentCacheReservationManager::CacheReservationHandle(
-            std::enable_shared_from_this<
-                ConcurrentCacheReservationManager>::shared_from_this(),
-            std::move(wrapped_handle)));
-    return s;
-  }
-  inline std::size_t GetTotalReservedCacheSize() override {
-    return cache_res_mgr_->GetTotalReservedCacheSize();
-  }
-  inline std::size_t GetTotalMemoryUsed() override {
-    std::lock_guard<std::mutex> lock(cache_res_mgr_mu_);
-    return cache_res_mgr_->GetTotalMemoryUsed();
-  }
+      std::shared_ptr<CacheReservationManager> cache_res_mgr);
+
+  ~CacheReservationHandle();

 private:
-  std::mutex cache_res_mgr_mu_;
+  std::size_t incremental_memory_used_;
  std::shared_ptr<CacheReservationManager> cache_res_mgr_;
 };
 }  // namespace ROCKSDB_NAMESPACE
@@ -15,6 +15,7 @@
 #include "cache/cache_entry_roles.h"
 #include "rocksdb/cache.h"
 #include "rocksdb/slice.h"
+#include "table/block_based/block_based_table_reader.h"
 #include "test_util/testharness.h"
 #include "util/coding.h"

@@ -22,24 +23,25 @@ namespace ROCKSDB_NAMESPACE {
 class CacheReservationManagerTest : public ::testing::Test {
 protected:
  static constexpr std::size_t kSizeDummyEntry =
-      CacheReservationManagerImpl<CacheEntryRole::kMisc>::GetDummyEntrySize();
+      CacheReservationManager::GetDummyEntrySize();
  static constexpr std::size_t kCacheCapacity = 4096 * kSizeDummyEntry;
  static constexpr int kNumShardBits = 0;  // 2^0 shard
  static constexpr std::size_t kMetaDataChargeOverhead = 10000;

  std::shared_ptr<Cache> cache = NewLRUCache(kCacheCapacity, kNumShardBits);
-  std::shared_ptr<CacheReservationManager> test_cache_rev_mng;
+  std::unique_ptr<CacheReservationManager> test_cache_rev_mng;

  CacheReservationManagerTest() {
-    test_cache_rev_mng =
-        std::make_shared<CacheReservationManagerImpl<CacheEntryRole::kMisc>>(
-            cache);
+    test_cache_rev_mng.reset(new CacheReservationManager(cache));
  }
 };

 TEST_F(CacheReservationManagerTest, GenerateCacheKey) {
  std::size_t new_mem_used = 1 * kSizeDummyEntry;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  ASSERT_EQ(s, Status::OK());
  ASSERT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry);
  ASSERT_LT(cache->GetPinnedUsage(),
@@ -64,7 +66,10 @@ TEST_F(CacheReservationManagerTest, GenerateCacheKey) {

 TEST_F(CacheReservationManagerTest, KeepCacheReservationTheSame) {
  std::size_t new_mem_used = 1 * kSizeDummyEntry;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  ASSERT_EQ(s, Status::OK());
  ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
            1 * kSizeDummyEntry);
@@ -74,7 +79,9 @@ TEST_F(CacheReservationManagerTest, KeepCacheReservationTheSame) {
  ASSERT_LT(initial_pinned_usage,
            1 * kSizeDummyEntry + kMetaDataChargeOverhead);

-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to keep cache reservation the same when new_mem_used equals "
         "to current cache reservation";
@@ -93,7 +100,10 @@ TEST_F(CacheReservationManagerTest, KeepCacheReservationTheSame) {
 TEST_F(CacheReservationManagerTest,
       IncreaseCacheReservationByMultiplesOfDummyEntrySize) {
  std::size_t new_mem_used = 2 * kSizeDummyEntry;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to increase cache reservation correctly";
  EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
@@ -111,7 +121,10 @@ TEST_F(CacheReservationManagerTest,
 TEST_F(CacheReservationManagerTest,
       IncreaseCacheReservationNotByMultiplesOfDummyEntrySize) {
  std::size_t new_mem_used = 2 * kSizeDummyEntry + kSizeDummyEntry / 2;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to increase cache reservation correctly";
  EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
@@ -130,7 +143,7 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
     IncreaseCacheReservationOnFullCache) {
  ;
  constexpr std::size_t kSizeDummyEntry =
-      CacheReservationManagerImpl<CacheEntryRole::kMisc>::GetDummyEntrySize();
+      CacheReservationManager::GetDummyEntrySize();
  constexpr std::size_t kSmallCacheCapacity = 4 * kSizeDummyEntry;
  constexpr std::size_t kBigCacheCapacity = 4096 * kSizeDummyEntry;
  constexpr std::size_t kMetaDataChargeOverhead = 10000;
@@ -140,12 +153,14 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
  lo.num_shard_bits = 0;  // 2^0 shard
  lo.strict_capacity_limit = true;
  std::shared_ptr<Cache> cache = NewLRUCache(lo);
-  std::shared_ptr<CacheReservationManager> test_cache_rev_mng =
-      std::make_shared<CacheReservationManagerImpl<CacheEntryRole::kMisc>>(
-          cache);
+  std::unique_ptr<CacheReservationManager> test_cache_rev_mng(
+      new CacheReservationManager(cache));

  std::size_t new_mem_used = kSmallCacheCapacity + 1;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::Incomplete())
      << "Failed to return status to indicate failure of dummy entry insertion "
         "during cache reservation on full cache";
@@ -168,7 +183,9 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
         "encountering cache resevation failure due to full cache";

  new_mem_used = kSmallCacheCapacity / 2;  // 2 dummy entries
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to decrease cache reservation after encountering cache "
         "reservation failure due to full cache";
@@ -190,7 +207,9 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,

  // Create cache full again for subsequent tests
  new_mem_used = kSmallCacheCapacity + 1;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::Incomplete())
      << "Failed to return status to indicate failure of dummy entry insertion "
         "during cache reservation on full cache";
@@ -216,7 +235,9 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
  // succeed
  cache->SetCapacity(kBigCacheCapacity);
  new_mem_used = kSmallCacheCapacity + 1;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to increase cache reservation after increasing cache capacity "
         "and mitigating cache full error";
@@ -238,7 +259,10 @@ TEST(CacheReservationManagerIncreaseReservcationOnFullCacheTest,
 TEST_F(CacheReservationManagerTest,
       DecreaseCacheReservationByMultiplesOfDummyEntrySize) {
  std::size_t new_mem_used = 2 * kSizeDummyEntry;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  ASSERT_EQ(s, Status::OK());
  ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
            2 * kSizeDummyEntry);
@@ -248,7 +272,9 @@ TEST_F(CacheReservationManagerTest,
            2 * kSizeDummyEntry + kMetaDataChargeOverhead);

  new_mem_used = 1 * kSizeDummyEntry;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to decrease cache reservation correctly";
  EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
@@ -266,7 +292,10 @@ TEST_F(CacheReservationManagerTest,
 TEST_F(CacheReservationManagerTest,
       DecreaseCacheReservationNotByMultiplesOfDummyEntrySize) {
  std::size_t new_mem_used = 2 * kSizeDummyEntry;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  ASSERT_EQ(s, Status::OK());
  ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
            2 * kSizeDummyEntry);
@@ -276,7 +305,9 @@ TEST_F(CacheReservationManagerTest,
            2 * kSizeDummyEntry + kMetaDataChargeOverhead);

  new_mem_used = kSizeDummyEntry / 2;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to decrease cache reservation correctly";
  EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
@@ -294,7 +325,7 @@ TEST_F(CacheReservationManagerTest,
 TEST(CacheReservationManagerWithDelayedDecreaseTest,
     DecreaseCacheReservationWithDelayedDecrease) {
  constexpr std::size_t kSizeDummyEntry =
-      CacheReservationManagerImpl<CacheEntryRole::kMisc>::GetDummyEntrySize();
+      CacheReservationManager::GetDummyEntrySize();
  constexpr std::size_t kCacheCapacity = 4096 * kSizeDummyEntry;
  constexpr std::size_t kMetaDataChargeOverhead = 10000;

@@ -302,12 +333,14 @@ TEST(CacheReservationManagerWithDelayedDecreaseTest,
  lo.capacity = kCacheCapacity;
  lo.num_shard_bits = 0;
  std::shared_ptr<Cache> cache = NewLRUCache(lo);
-  std::shared_ptr<CacheReservationManager> test_cache_rev_mng =
-      std::make_shared<CacheReservationManagerImpl<CacheEntryRole::kMisc>>(
-          cache, true /* delayed_decrease */);
+  std::unique_ptr<CacheReservationManager> test_cache_rev_mng(
+      new CacheReservationManager(cache, true /* delayed_decrease */));

  std::size_t new_mem_used = 8 * kSizeDummyEntry;
-  Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  Status s =
+      test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  ASSERT_EQ(s, Status::OK());
  ASSERT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
            8 * kSizeDummyEntry);
@@ -318,7 +351,9 @@ TEST(CacheReservationManagerWithDelayedDecreaseTest,
            8 * kSizeDummyEntry + kMetaDataChargeOverhead);

  new_mem_used = 6 * kSizeDummyEntry;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK()) << "Failed to delay decreasing cache reservation";
  EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
            8 * kSizeDummyEntry)
@@ -330,7 +365,9 @@ TEST(CacheReservationManagerWithDelayedDecreaseTest,
      << "Failed to delay decreasing underlying dummy entries in cache";

  new_mem_used = 7 * kSizeDummyEntry;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK()) << "Failed to delay decreasing cache reservation";
  EXPECT_EQ(test_cache_rev_mng->GetTotalReservedCacheSize(),
            8 * kSizeDummyEntry)
@@ -342,7 +379,9 @@ TEST(CacheReservationManagerWithDelayedDecreaseTest,
      << "Failed to delay decreasing underlying dummy entries in cache";

  new_mem_used = 6 * kSizeDummyEntry - 1;
-  s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+  s = test_cache_rev_mng
+          ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+              new_mem_used);
  EXPECT_EQ(s, Status::OK())
      << "Failed to decrease cache reservation correctly when new_mem_used < "
         "GetTotalReservedCacheSize() * 3 / 4 on delayed decrease mode";
@@ -366,7 +405,7 @@ TEST(CacheReservationManagerWithDelayedDecreaseTest,
 TEST(CacheReservationManagerDestructorTest,
     ReleaseRemainingDummyEntriesOnDestruction) {
  constexpr std::size_t kSizeDummyEntry =
-      CacheReservationManagerImpl<CacheEntryRole::kMisc>::GetDummyEntrySize();
+      CacheReservationManager::GetDummyEntrySize();
  constexpr std::size_t kCacheCapacity = 4096 * kSizeDummyEntry;
  constexpr std::size_t kMetaDataChargeOverhead = 10000;

@@ -375,11 +414,13 @@ TEST(CacheReservationManagerDestructorTest,
  lo.num_shard_bits = 0;
  std::shared_ptr<Cache> cache = NewLRUCache(lo);
  {
-    std::shared_ptr<CacheReservationManager> test_cache_rev_mng =
-        std::make_shared<CacheReservationManagerImpl<CacheEntryRole::kMisc>>(
-            cache);
+    std::unique_ptr<CacheReservationManager> test_cache_rev_mng(
+        new CacheReservationManager(cache));
    std::size_t new_mem_used = 1 * kSizeDummyEntry;
-    Status s = test_cache_rev_mng->UpdateCacheReservation(new_mem_used);
+    Status s =
+        test_cache_rev_mng
+            ->UpdateCacheReservation<ROCKSDB_NAMESPACE::CacheEntryRole::kMisc>(
+                new_mem_used);
    ASSERT_EQ(s, Status::OK());
    ASSERT_GE(cache->GetPinnedUsage(), 1 * kSizeDummyEntry);
    ASSERT_LT(cache->GetPinnedUsage(),
@@ -401,19 +442,18 @@ TEST(CacheReservationHandleTest, HandleTest) {
  std::shared_ptr<Cache> cache = NewLRUCache(lo);

  std::shared_ptr<CacheReservationManager> test_cache_rev_mng(
-      std::make_shared<CacheReservationManagerImpl<CacheEntryRole::kMisc>>(
-          cache));
+      std::make_shared<CacheReservationManager>(cache));

  std::size_t mem_used = 0;
  const std::size_t incremental_mem_used_handle_1 = 1 * kSizeDummyEntry;
  const std::size_t incremental_mem_used_handle_2 = 2 * kSizeDummyEntry;
-  std::unique_ptr<CacheReservationManager::CacheReservationHandle> handle_1,
+  std::unique_ptr<CacheReservationHandle<CacheEntryRole::kMisc>> handle_1,
      handle_2;

  // To test consecutive CacheReservationManager::MakeCacheReservation works
  // correctly in terms of returning the handle as well as updating cache
  // reservation and the latest total memory used
-  Status s = test_cache_rev_mng->MakeCacheReservation(
+  Status s = test_cache_rev_mng->MakeCacheReservation<CacheEntryRole::kMisc>(
      incremental_mem_used_handle_1, &handle_1);
  mem_used = mem_used + incremental_mem_used_handle_1;
  ASSERT_EQ(s, Status::OK());
@@ -423,8 +463,8 @@ TEST(CacheReservationHandleTest, HandleTest) {
  EXPECT_GE(cache->GetPinnedUsage(), mem_used);
  EXPECT_LT(cache->GetPinnedUsage(), mem_used + kMetaDataChargeOverhead);

-  s = test_cache_rev_mng->MakeCacheReservation(incremental_mem_used_handle_2,
-                                               &handle_2);
+  s = test_cache_rev_mng->MakeCacheReservation<CacheEntryRole::kMisc>(
+      incremental_mem_used_handle_2, &handle_2);
  mem_used = mem_used + incremental_mem_used_handle_2;
  ASSERT_EQ(s, Status::OK());
  EXPECT_TRUE(handle_2 != nullptr);
@@ -433,9 +473,8 @@ TEST(CacheReservationHandleTest, HandleTest) {
  EXPECT_GE(cache->GetPinnedUsage(), mem_used);
  EXPECT_LT(cache->GetPinnedUsage(), mem_used + kMetaDataChargeOverhead);

-  // To test
-  // CacheReservationManager::CacheReservationHandle::~CacheReservationHandle()
-  // works correctly in releasing the cache reserved for the handle
+  // To test CacheReservationHandle::~CacheReservationHandle() works correctly
+  // in releasing the cache reserved for the handle
  handle_1.reset();
  EXPECT_TRUE(handle_1 == nullptr);
  mem_used = mem_used - incremental_mem_used_handle_1;
@@ -286,8 +286,8 @@ class ClockCacheShard final : public CacheShard {
    return Lookup(key, hash);
  }
  bool Release(Cache::Handle* handle, bool /*useful*/,
-               bool erase_if_last_ref) override {
-    return Release(handle, erase_if_last_ref);
+               bool force_erase) override {
+    return Release(handle, force_erase);
  }
  bool IsReady(Cache::Handle* /*handle*/) override { return true; }
  void Wait(Cache::Handle* /*handle*/) override {}
@@ -297,7 +297,7 @@ class ClockCacheShard final : public CacheShard {
  //
  // Not necessary to hold mutex_ before being called.
  bool Ref(Cache::Handle* handle) override;
-  bool Release(Cache::Handle* handle, bool erase_if_last_ref = false) override;
+  bool Release(Cache::Handle* handle, bool force_erase = false) override;
  void Erase(const Slice& key, uint32_t hash) override;
  bool EraseAndConfirm(const Slice& key, uint32_t hash,
                       CleanupContext* context);
@@ -687,7 +687,7 @@ Status ClockCacheShard::Insert(const Slice& key, uint32_t hash, void* value,
  Status s;
  if (out_handle != nullptr) {
    if (handle == nullptr) {
-      s = Status::Incomplete("Insert failed due to CLOCK cache being full.");
+      s = Status::Incomplete("Insert failed due to LRU cache being full.");
    } else {
      *out_handle = reinterpret_cast<Cache::Handle*>(handle);
    }
@@ -725,11 +725,11 @@ Cache::Handle* ClockCacheShard::Lookup(const Slice& key, uint32_t hash) {
  return reinterpret_cast<Cache::Handle*>(handle);
 }

-bool ClockCacheShard::Release(Cache::Handle* h, bool erase_if_last_ref) {
+bool ClockCacheShard::Release(Cache::Handle* h, bool force_erase) {
  CleanupContext context;
  CacheHandle* handle = reinterpret_cast<CacheHandle*>(h);
  bool erased = Unref(handle, true, &context);
-  if (erase_if_last_ref && !erased) {
+  if (force_erase && !erased) {
    erased = EraseAndConfirm(handle->key, handle->hash, &context);
  }
  Cleanup(context);
@@ -76,12 +76,13 @@ LRUHandle** LRUHandleTable::FindPointer(const Slice& key, uint32_t hash) {

 void LRUHandleTable::Resize() {
  if (length_bits_ >= max_length_bits_) {
-    // Due to reaching limit of hash information, if we made the table bigger,
-    // we would allocate more addresses but only the same number would be used.
+    // Due to reaching limit of hash information, if we made the table
+    // bigger, we would allocate more addresses but only the same
+    // number would be used.
    return;
  }
  if (length_bits_ >= 31) {
-    // Avoid undefined behavior shifting uint32_t by 32.
+    // Avoid undefined behavior shifting uint32_t by 32
    return;
  }

@@ -124,7 +125,7 @@ LRUCacheShard::LRUCacheShard(
      mutex_(use_adaptive_mutex),
      secondary_cache_(secondary_cache) {
  set_metadata_charge_policy(metadata_charge_policy);
-  // Make empty circular linked list.
+  // Make empty circular linked list
  lru_.next = &lru_;
  lru_.prev = &lru_;
  lru_low_pri_ = &lru_;
@@ -137,7 +138,7 @@ void LRUCacheShard::EraseUnRefEntries() {
    MutexLock l(&mutex_);
    while (lru_.next != &lru_) {
      LRUHandle* old = lru_.next;
-      // LRU list contains only elements which can be evicted.
+      // LRU list contains only elements which can be evicted
      assert(old->InCache() && !old->HasRefs());
      LRU_Remove(old);
      table_.Remove(old->key(), old->hash);
@@ -167,7 +168,7 @@ void LRUCacheShard::ApplyToSomeEntries(

  assert(average_entries_per_lock > 0);
  // Assuming we are called with same average_entries_per_lock repeatedly,
-  // this simplifies some logic (index_end will not overflow).
+  // this simplifies some logic (index_end will not overflow)
  assert(average_entries_per_lock < length || *state == 0);

  uint32_t index_begin = *state >> (32 - length_bits);
@@ -273,7 +274,7 @@ void LRUCacheShard::EvictFromLRU(size_t charge,
                                 autovector<LRUHandle*>* deleted) {
  while ((usage_ + charge) > capacity_ && lru_.next != &lru_) {
    LRUHandle* old = lru_.next;
-    // LRU list contains only elements which can be evicted.
+    // LRU list contains only elements which can be evicted
    assert(old->InCache() && !old->HasRefs());
    LRU_Remove(old);
    table_.Remove(old->key(), old->hash);
@@ -294,8 +295,8 @@ void LRUCacheShard::SetCapacity(size_t capacity) {
    EvictFromLRU(0, &last_reference_list);
  }

-  // Try to insert the evicted entries into tiered cache.
-  // Free the entries outside of mutex for performance reasons.
+  // Try to insert the evicted entries into tiered cache
+  // Free the entries outside of mutex for performance reasons
  for (auto entry : last_reference_list) {
    if (secondary_cache_ && entry->IsSecondaryCacheCompatible() &&
        !entry->IsPromoted()) {
@@ -321,7 +322,7 @@ Status LRUCacheShard::InsertItem(LRUHandle* e, Cache::Handle** handle,
    MutexLock l(&mutex_);

    // Free the space following strict LRU policy until enough space
-    // is freed or the lru list is empty.
+    // is freed or the lru list is empty
    EvictFromLRU(total_charge, &last_reference_list);

    if ((usage_ + total_charge) > capacity_ &&
@@ -348,7 +349,7 @@ Status LRUCacheShard::InsertItem(LRUHandle* e, Cache::Handle** handle,
        assert(old->InCache());
        old->SetInCache(false);
        if (!old->HasRefs()) {
-          // old is on LRU because it's in cache and its reference count is 0.
+          // old is on LRU because it's in cache and its reference count is 0
          LRU_Remove(old);
          size_t old_total_charge =
              old->CalcTotalCharge(metadata_charge_policy_);
@@ -360,7 +361,7 @@ Status LRUCacheShard::InsertItem(LRUHandle* e, Cache::Handle** handle,
      if (handle == nullptr) {
        LRU_Insert(e);
      } else {
-        // If caller already holds a ref, no need to take one here.
+        // If caller already holds a ref, no need to take one here
        if (!e->HasRefs()) {
          e->Ref();
        }
@@ -369,8 +370,8 @@ Status LRUCacheShard::InsertItem(LRUHandle* e, Cache::Handle** handle,
    }
  }

-  // Try to insert the evicted entries into the secondary cache.
-  // Free the entries here outside of mutex for performance reasons.
+  // Try to insert the evicted entries into the secondary cache
+  // Free the entries here outside of mutex for performance reasons
  for (auto entry : last_reference_list) {
    if (secondary_cache_ && entry->IsSecondaryCacheCompatible() &&
        !entry->IsPromoted()) {
@@ -403,7 +404,7 @@ void LRUCacheShard::Promote(LRUHandle* e) {
    Status s = InsertItem(e, &handle, /*free_handle_on_fail=*/false);
    if (!s.ok()) {
      // Item is in memory, but not accounted against the cache capacity.
-      // When the handle is released, the item should get deleted.
+      // When the handle is released, the item should get deleted
      assert(!e->InCache());
    }
  } else {
@@ -436,8 +437,8 @@ Cache::Handle* LRUCacheShard::Lookup(
  }

  // If handle table lookup failed, then allocate a handle outside the
-  // mutex if we're going to lookup in the secondary cache.
-  // Only support synchronous for now.
+  // mutex if we're going to lookup in the secondary cache
+  // Only support synchronous for now
  // TODO: Support asynchronous lookup in secondary cache
  if (!e && secondary_cache_ && helper && helper->saveto_cb) {
    // For objects from the secondary cache, we expect the caller to provide
@@ -468,7 +469,7 @@ Cache::Handle* LRUCacheShard::Lookup(
      if (wait) {
        Promote(e);
        if (!e->value) {
-          // The secondary cache returned a handle, but the lookup failed.
+          // The secondary cache returned a handle, but the lookup failed
          e->Unref();
          e->Free();
          e = nullptr;
@@ -478,7 +479,7 @@ Cache::Handle* LRUCacheShard::Lookup(
        }
      } else {
        // If wait is false, we always return a handle and let the caller
-        // release the handle after checking for success or failure.
+        // release the handle after checking for success or failure
        e->SetIncomplete(true);
        // This may be slightly inaccurate, if the lookup eventually fails.
        // But the probability is very low.
@@ -493,7 +494,7 @@ Cache::Handle* LRUCacheShard::Lookup(
 bool LRUCacheShard::Ref(Cache::Handle* h) {
  LRUHandle* e = reinterpret_cast<LRUHandle*>(h);
  MutexLock l(&mutex_);
-  // To create another reference - entry must be already externally referenced.
+  // To create another reference - entry must be already externally referenced
  assert(e->HasRefs());
  e->Ref();
  return true;
@@ -506,7 +507,7 @@ void LRUCacheShard::SetHighPriorityPoolRatio(double high_pri_pool_ratio) {
  MaintainPoolSize();
 }

-bool LRUCacheShard::Release(Cache::Handle* handle, bool erase_if_last_ref) {
+bool LRUCacheShard::Release(Cache::Handle* handle, bool force_erase) {
  if (handle == nullptr) {
    return false;
  }
@@ -516,15 +517,15 @@ bool LRUCacheShard::Release(Cache::Handle* handle, bool erase_if_last_ref) {
    MutexLock l(&mutex_);
    last_reference = e->Unref();
    if (last_reference && e->InCache()) {
-      // The item is still in cache, and nobody else holds a reference to it.
-      if (usage_ > capacity_ || erase_if_last_ref) {
-        // The LRU list must be empty since the cache is full.
-        assert(lru_.next == &lru_ || erase_if_last_ref);
-        // Take this opportunity and remove the item.
+      // The item is still in cache, and nobody else holds a reference to it
+      if (usage_ > capacity_ || force_erase) {
+        // The LRU list must be empty since the cache is full
+        assert(lru_.next == &lru_ || force_erase);
+        // Take this opportunity and remove the item
        table_.Remove(e->key(), e->hash);
        e->SetInCache(false);
      } else {
-        // Put the item back on the LRU list, and don't free it.
+        // Put the item back on the LRU list, and don't free it
        LRU_Insert(e);
        last_reference = false;
      }
@@ -541,7 +542,7 @@ bool LRUCacheShard::Release(Cache::Handle* handle, bool erase_if_last_ref) {
    }
  }

-  // Free the entry here outside of mutex for performance reasons.
+  // Free the entry here outside of mutex for performance reasons
  if (last_reference) {
    e->Free();
  }
@@ -553,8 +554,8 @@ Status LRUCacheShard::Insert(const Slice& key, uint32_t hash, void* value,
                             void (*deleter)(const Slice& key, void* value),
                             const Cache::CacheItemHelper* helper,
                             Cache::Handle** handle, Cache::Priority priority) {
-  // Allocate the memory here outside of the mutex.
-  // If the cache is full, we'll have to release it.
+  // Allocate the memory here outside of the mutex
+  // If the cache is full, we'll have to release it
  // It shouldn't happen very often though.
  LRUHandle* e = reinterpret_cast<LRUHandle*>(
      new char[sizeof(LRUHandle) - 1 + key.size()]);
@@ -602,8 +603,8 @@ void LRUCacheShard::Erase(const Slice& key, uint32_t hash) {
    }
  }

-  // Free the entry here outside of mutex for performance reasons.
-  // last_reference will only be true if e != nullptr.
+  // Free the entry here outside of mutex for performance reasons
+  // last_reference will only be true if e != nullptr
  if (last_reference) {
    e->Free();
  }
@@ -704,7 +705,7 @@ uint32_t LRUCache::GetHash(Handle* handle) const {
 }

 void LRUCache::DisownData() {
-  // Leak data only if that won't generate an ASAN/valgrind warning.
+  // Leak data only if that won't generate an ASAN/valgrind warning
  if (!kMustFreeHeapAllocations) {
    shards_ = nullptr;
    num_shards_ = 0;
@@ -764,10 +765,10 @@ std::shared_ptr<Cache> NewLRUCache(
    CacheMetadataChargePolicy metadata_charge_policy,
    const std::shared_ptr<SecondaryCache>& secondary_cache) {
  if (num_shard_bits >= 20) {
-    return nullptr;  // The cache cannot be sharded into too many fine pieces.
+    return nullptr;  // the cache cannot be sharded into too many fine pieces
  }
  if (high_pri_pool_ratio < 0.0 || high_pri_pool_ratio > 1.0) {
-    // Invalid high_pri_pool_ratio
+    // invalid high_pri_pool_ratio
    return nullptr;
  }
  if (num_shard_bits < 0) {
@@ -81,11 +81,11 @@ struct LRUHandle {
    IN_HIGH_PRI_POOL = (1 << 2),
    // Whether this entry has had any lookups (hits).
    HAS_HIT = (1 << 3),
-    // Can this be inserted into the secondary cache.
+    // Can this be inserted into the secondary cache
    IS_SECONDARY_CACHE_COMPATIBLE = (1 << 4),
-    // Is the handle still being read from a lower tier.
+    // Is the handle still being read from a lower tier
    IS_PENDING = (1 << 5),
-    // Has the item been promoted from a lower tier.
+    // Has the item been promoted from a lower tier
    IS_PROMOTED = (1 << 6),
  };

@@ -208,7 +208,7 @@ struct LRUHandle {
    delete[] reinterpret_cast<char*>(this);
  }

-  // Calculate the memory usage by metadata.
+  // Calculate the memory usage by metadata
  inline size_t CalcTotalCharge(
      CacheMetadataChargePolicy metadata_charge_policy) {
    size_t meta_charge = 0;
@@ -216,7 +216,7 @@ struct LRUHandle {
 #ifdef ROCKSDB_MALLOC_USABLE_SIZE
      meta_charge += malloc_usable_size(static_cast<void*>(this));
 #else
-      // This is the size that is used when a new handle is created.
+      // This is the size that is used when a new handle is created
      meta_charge += sizeof(LRUHandle) - 1 + key_length;
 #endif
    }
@@ -272,10 +272,10 @@ class LRUHandleTable {
  // a linked list of cache entries that hash into the bucket.
  std::unique_ptr<LRUHandle*[]> list_;

-  // Number of elements currently in the table.
+  // Number of elements currently in the table
  uint32_t elems_;

-  // Set from max_upper_hash_bits (see constructor).
+  // Set from max_upper_hash_bits (see constructor)
  const int max_length_bits_;
 };

@@ -291,7 +291,7 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {

  // Separate from constructor so caller can easily make an array of LRUCache
  // if current usage is more than new capacity, the function will attempt to
-  // free the needed space.
+  // free the needed space
  virtual void SetCapacity(size_t capacity) override;

  // Set the flag to reject insertion if cache if full.
@@ -314,7 +314,8 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {
    assert(helper);
    return Insert(key, hash, value, charge, nullptr, helper, handle, priority);
  }
-  // If helper_cb is null, the values of the following arguments don't matter.
+  // If helper_cb is null, the values of the following arguments don't
+  // matter
  virtual Cache::Handle* Lookup(const Slice& key, uint32_t hash,
                                const ShardedCache::CacheItemHelper* helper,
                                const ShardedCache::CreateCallback& create_cb,
@@ -325,14 +326,14 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {
                  nullptr);
  }
  virtual bool Release(Cache::Handle* handle, bool /*useful*/,
-                       bool erase_if_last_ref) override {
-    return Release(handle, erase_if_last_ref);
+                       bool force_erase) override {
+    return Release(handle, force_erase);
  }
  virtual bool IsReady(Cache::Handle* /*handle*/) override;
  virtual void Wait(Cache::Handle* /*handle*/) override {}
  virtual bool Ref(Cache::Handle* handle) override;
  virtual bool Release(Cache::Handle* handle,
-                       bool erase_if_last_ref = false) override;
+                       bool force_erase = false) override;
  virtual void Erase(const Slice& key, uint32_t hash) override;

  // Although in some platforms the update of size_t is atomic, to make sure
@@ -353,8 +354,8 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {

  void TEST_GetLRUList(LRUHandle** lru, LRUHandle** lru_low_pri);

-  //  Retrieves number of elements in LRU, for unit test purpose only.
-  //  Not threadsafe.
+  //  Retrieves number of elements in LRU, for unit test purpose only
+  //  not threadsafe
  size_t TEST_GetLRUSize();

  //  Retrieves high pri pool ratio
@@ -364,8 +365,7 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {
  friend class LRUCache;
  // Insert an item into the hash table and, if handle is null, insert into
  // the LRU list. Older items are evicted as necessary. If the cache is full
-  // and free_handle_on_fail is true, the item is deleted and handle is set to
-  // nullptr.
+  // and free_handle_on_fail is true, the item is deleted and handle is set to.
  Status InsertItem(LRUHandle* item, Cache::Handle** handle,
                    bool free_handle_on_fail);
  Status Insert(const Slice& key, uint32_t hash, void* value, size_t charge,
@@ -389,7 +389,7 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {
  // Free some space following strict LRU policy until enough space
  // to hold (usage_ + charge) is freed or the lru list is empty
  // This function is not thread safe - it needs to be executed while
-  // holding the mutex_.
+  // holding the mutex_
  void EvictFromLRU(size_t charge, autovector<LRUHandle*>* deleted);

  // Initialized before use.
@@ -429,10 +429,10 @@ class ALIGN_AS(CACHE_LINE_SIZE) LRUCacheShard final : public CacheShard {
  // ------------vvvvvvvvvvvvv-----------
  LRUHandleTable table_;

-  // Memory size for entries residing in the cache.
+  // Memory size for entries residing in the cache
  size_t usage_;

-  // Memory size for entries residing only in the LRU list.
+  // Memory size for entries residing only in the LRU list
  size_t lru_usage_;

  // mutex_ protects the following state.
@@ -467,9 +467,9 @@ class LRUCache
  virtual void DisownData() override;
  virtual void WaitAll(std::vector<Handle*>& handles) override;

-  //  Retrieves number of elements in LRU, for unit test purpose only.
+  //  Retrieves number of elements in LRU, for unit test purpose only
  size_t TEST_GetLRUSize();
-  //  Retrieves high pri pool ratio.
+  //  Retrieves high pri pool ratio
  double GetHighPriPoolRatio();

 private:
@@ -1,168 +0,0 @@
-//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
-//  This source code is licensed under both the GPLv2 (found in the
-//  COPYING file in the root directory) and Apache 2.0 License
-//  (found in the LICENSE.Apache file in the root directory).
-
-#include "cache/lru_secondary_cache.h"
-
-#include <memory>
-
-#include "memory/memory_allocator.h"
-#include "util/compression.h"
-#include "util/string_util.h"
-
-namespace ROCKSDB_NAMESPACE {
-
-namespace {
-
-void DeletionCallback(const Slice& /*key*/, void* obj) {
-  delete reinterpret_cast<CacheAllocationPtr*>(obj);
-  obj = nullptr;
-}
-
-}  // namespace
-
-LRUSecondaryCache::LRUSecondaryCache(
-    size_t capacity, int num_shard_bits, bool strict_capacity_limit,
-    double high_pri_pool_ratio,
-    std::shared_ptr<MemoryAllocator> memory_allocator, bool use_adaptive_mutex,
-    CacheMetadataChargePolicy metadata_charge_policy,
-    CompressionType compression_type, uint32_t compress_format_version)
-    : cache_options_(capacity, num_shard_bits, strict_capacity_limit,
-                     high_pri_pool_ratio, memory_allocator, use_adaptive_mutex,
-                     metadata_charge_policy, compression_type,
-                     compress_format_version) {
-  cache_ = NewLRUCache(capacity, num_shard_bits, strict_capacity_limit,
-                       high_pri_pool_ratio, memory_allocator,
-                       use_adaptive_mutex, metadata_charge_policy);
-}
-
-LRUSecondaryCache::~LRUSecondaryCache() { cache_.reset(); }
-
-std::unique_ptr<SecondaryCacheResultHandle> LRUSecondaryCache::Lookup(
-    const Slice& key, const Cache::CreateCallback& create_cb, bool /*wait*/) {
-  std::unique_ptr<SecondaryCacheResultHandle> handle;
-  Cache::Handle* lru_handle = cache_->Lookup(key);
-  if (lru_handle == nullptr) {
-    return handle;
-  }
-
-  CacheAllocationPtr* ptr =
-      reinterpret_cast<CacheAllocationPtr*>(cache_->Value(lru_handle));
-  void* value = nullptr;
-  size_t charge = 0;
-  Status s;
-
-  if (cache_options_.compression_type == kNoCompression) {
-    s = create_cb(ptr->get(), cache_->GetCharge(lru_handle), &value, &charge);
-  } else {
-    UncompressionContext uncompression_context(cache_options_.compression_type);
-    UncompressionInfo uncompression_info(uncompression_context,
-                                         UncompressionDict::GetEmptyDict(),
-                                         cache_options_.compression_type);
-
-    size_t uncompressed_size = 0;
-    CacheAllocationPtr uncompressed;
-    uncompressed = UncompressData(
-        uncompression_info, (char*)ptr->get(), cache_->GetCharge(lru_handle),
-        &uncompressed_size, cache_options_.compress_format_version,
-        cache_options_.memory_allocator.get());
-
-    if (!uncompressed) {
-      cache_->Release(lru_handle, true);
-      return handle;
-    }
-    s = create_cb(uncompressed.get(), uncompressed_size, &value, &charge);
-  }
-
-  if (!s.ok()) {
-    cache_->Release(lru_handle, true);
-    return handle;
-  }
-
-  handle.reset(new LRUSecondaryCacheResultHandle(value, charge));
-  cache_->Release(lru_handle);
-  return handle;
-}
-
-Status LRUSecondaryCache::Insert(const Slice& key, void* value,
-                                 const Cache::CacheItemHelper* helper) {
-  size_t size = (*helper->size_cb)(value);
-  CacheAllocationPtr ptr =
-      AllocateBlock(size, cache_options_.memory_allocator.get());
-
-  Status s = (*helper->saveto_cb)(value, 0, size, ptr.get());
-  if (!s.ok()) {
-    return s;
-  }
-  Slice val(ptr.get(), size);
-
-  std::string compressed_val;
-  if (cache_options_.compression_type != kNoCompression) {
-    CompressionOptions compression_opts;
-    CompressionContext compression_context(cache_options_.compression_type);
-    uint64_t sample_for_compression = 0;
-    CompressionInfo compression_info(
-        compression_opts, compression_context, CompressionDict::GetEmptyDict(),
-        cache_options_.compression_type, sample_for_compression);
-
-    bool success =
-        CompressData(val, compression_info,
-                     cache_options_.compress_format_version, &compressed_val);
-
-    if (!success) {
-      return Status::Corruption("Error compressing value.");
-    }
-
-    val = Slice(compressed_val);
-    size = compressed_val.size();
-    ptr = AllocateBlock(size, cache_options_.memory_allocator.get());
-    memcpy(ptr.get(), compressed_val.data(), size);
-  }
-
-  CacheAllocationPtr* buf = new CacheAllocationPtr(std::move(ptr));
-
-  return cache_->Insert(key, buf, size, DeletionCallback);
-}
-
-void LRUSecondaryCache::Erase(const Slice& key) { cache_->Erase(key); }
-
-std::string LRUSecondaryCache::GetPrintableOptions() const {
-  std::string ret;
-  ret.reserve(20000);
-  const int kBufferSize = 200;
-  char buffer[kBufferSize];
-  ret.append(cache_->GetPrintableOptions());
-  snprintf(buffer, kBufferSize, "    compression_type : %s\n",
-           CompressionTypeToString(cache_options_.compression_type).c_str());
-  ret.append(buffer);
-  snprintf(buffer, kBufferSize, "    compression_type : %d\n",
-           cache_options_.compress_format_version);
-  ret.append(buffer);
-  return ret;
-}
-
-std::shared_ptr<SecondaryCache> NewLRUSecondaryCache(
-    size_t capacity, int num_shard_bits, bool strict_capacity_limit,
-    double high_pri_pool_ratio,
-    std::shared_ptr<MemoryAllocator> memory_allocator, bool use_adaptive_mutex,
-    CacheMetadataChargePolicy metadata_charge_policy,
-    CompressionType compression_type, uint32_t compress_format_version) {
-  return std::make_shared<LRUSecondaryCache>(
-      capacity, num_shard_bits, strict_capacity_limit, high_pri_pool_ratio,
-      memory_allocator, use_adaptive_mutex, metadata_charge_policy,
-      compression_type, compress_format_version);
-}
-
-std::shared_ptr<SecondaryCache> NewLRUSecondaryCache(
-    const LRUSecondaryCacheOptions& opts) {
-  // The secondary_cache is disabled for this LRUCache instance.
-  assert(opts.secondary_cache == nullptr);
-  return NewLRUSecondaryCache(
-      opts.capacity, opts.num_shard_bits, opts.strict_capacity_limit,
-      opts.high_pri_pool_ratio, opts.memory_allocator, opts.use_adaptive_mutex,
-      opts.metadata_charge_policy, opts.compression_type,
-      opts.compress_format_version);
-}
-
-}  // namespace ROCKSDB_NAMESPACE
@@ -1,85 +0,0 @@
-// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
-//  This source code is licensed under both the GPLv2 (found in the
-//  COPYING file in the root directory) and Apache 2.0 License
-//  (found in the LICENSE.Apache file in the root directory).
-
-#pragma once
-
-#include <memory>
-
-#include "cache/lru_cache.h"
-#include "memory/memory_allocator.h"
-#include "rocksdb/secondary_cache.h"
-#include "rocksdb/slice.h"
-#include "rocksdb/status.h"
-#include "util/compression.h"
-
-namespace ROCKSDB_NAMESPACE {
-
-class LRUSecondaryCacheResultHandle : public SecondaryCacheResultHandle {
- public:
-  LRUSecondaryCacheResultHandle(void* value, size_t size)
-      : value_(value), size_(size) {}
-  virtual ~LRUSecondaryCacheResultHandle() override = default;
-
-  LRUSecondaryCacheResultHandle(const LRUSecondaryCacheResultHandle&) = delete;
-  LRUSecondaryCacheResultHandle& operator=(
-      const LRUSecondaryCacheResultHandle&) = delete;
-
-  bool IsReady() override { return true; }
-
-  void Wait() override {}
-
-  void* Value() override { return value_; }
-
-  size_t Size() override { return size_; }
-
- private:
-  void* value_;
-  size_t size_;
-};
-
-// The LRUSecondaryCache is a concrete implementation of
-// rocksdb::SecondaryCache.
-//
-// Users can also cast a pointer to it and call methods on
-// it directly, especially custom methods that may be added
-// in the future.  For example -
-// std::unique_ptr<rocksdb::SecondaryCache> cache =
-//      NewLRUSecondaryCache(opts);
-// static_cast<LRUSecondaryCache*>(cache.get())->Erase(key);
-
-class LRUSecondaryCache : public SecondaryCache {
- public:
-  LRUSecondaryCache(
-      size_t capacity, int num_shard_bits, bool strict_capacity_limit,
-      double high_pri_pool_ratio,
-      std::shared_ptr<MemoryAllocator> memory_allocator = nullptr,
-      bool use_adaptive_mutex = kDefaultToAdaptiveMutex,
-      CacheMetadataChargePolicy metadata_charge_policy =
-          kDontChargeCacheMetadata,
-      CompressionType compression_type = CompressionType::kLZ4Compression,
-      uint32_t compress_format_version = 2);
-  virtual ~LRUSecondaryCache() override;
-
-  const char* Name() const override { return "LRUSecondaryCache"; }
-
-  Status Insert(const Slice& key, void* value,
-                const Cache::CacheItemHelper* helper) override;
-
-  std::unique_ptr<SecondaryCacheResultHandle> Lookup(
-      const Slice& key, const Cache::CreateCallback& create_cb,
-      bool /*wait*/) override;
-
-  void Erase(const Slice& key) override;
-
-  void WaitAll(std::vector<SecondaryCacheResultHandle*> /*handles*/) override {}
-
-  std::string GetPrintableOptions() const override;
-
- private:
-  std::shared_ptr<Cache> cache_;
-  LRUSecondaryCacheOptions cache_options_;
-};
-
-}  // namespace ROCKSDB_NAMESPACE
@@ -1,597 +0,0 @@
-//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
-//  This source code is licensed under both the GPLv2 (found in the
-//  COPYING file in the root directory) and Apache 2.0 License
-//  (found in the LICENSE.Apache file in the root directory).
-
-#include "cache/lru_secondary_cache.h"
-
-#include <algorithm>
-#include <cstdint>
-
-#include "memory/jemalloc_nodump_allocator.h"
-#include "memory/memory_allocator.h"
-#include "test_util/testharness.h"
-#include "test_util/testutil.h"
-#include "util/compression.h"
-#include "util/random.h"
-
-namespace ROCKSDB_NAMESPACE {
-
-class LRUSecondaryCacheTest : public testing::Test {
- public:
-  LRUSecondaryCacheTest() : fail_create_(false) {}
-  ~LRUSecondaryCacheTest() {}
-
- protected:
-  class TestItem {
-   public:
-    TestItem(const char* buf, size_t size) : buf_(new char[size]), size_(size) {
-      memcpy(buf_.get(), buf, size);
-    }
-    ~TestItem() {}
-
-    char* Buf() { return buf_.get(); }
-    size_t Size() { return size_; }
-
-   private:
-    std::unique_ptr<char[]> buf_;
-    size_t size_;
-  };
-
-  static size_t SizeCallback(void* obj) {
-    return reinterpret_cast<TestItem*>(obj)->Size();
-  }
-
-  static Status SaveToCallback(void* from_obj, size_t from_offset,
-                               size_t length, void* out) {
-    TestItem* item = reinterpret_cast<TestItem*>(from_obj);
-    const char* buf = item->Buf();
-    EXPECT_EQ(length, item->Size());
-    EXPECT_EQ(from_offset, 0);
-    memcpy(out, buf, length);
-    return Status::OK();
-  }
-
-  static void DeletionCallback(const Slice& /*key*/, void* obj) {
-    delete reinterpret_cast<TestItem*>(obj);
-    obj = nullptr;
-  }
-
-  static Cache::CacheItemHelper helper_;
-
-  static Status SaveToCallbackFail(void* /*obj*/, size_t /*offset*/,
-                                   size_t /*size*/, void* /*out*/) {
-    return Status::NotSupported();
-  }
-
-  static Cache::CacheItemHelper helper_fail_;
-
-  Cache::CreateCallback test_item_creator = [&](const void* buf, size_t size,
-                                                void** out_obj,
-                                                size_t* charge) -> Status {
-    if (fail_create_) {
-      return Status::NotSupported();
-    }
-    *out_obj = reinterpret_cast<void*>(new TestItem((char*)buf, size));
-    *charge = size;
-    return Status::OK();
-  };
-
-  void SetFailCreate(bool fail) { fail_create_ = fail; }
-
-  void BasicTest(bool sec_cache_is_compressed, bool use_jemalloc) {
-    LRUSecondaryCacheOptions opts;
-    opts.capacity = 2048;
-    opts.num_shard_bits = 0;
-    opts.metadata_charge_policy = kDontChargeCacheMetadata;
-
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    if (use_jemalloc) {
-      JemallocAllocatorOptions jopts;
-      std::shared_ptr<MemoryAllocator> allocator;
-      std::string msg;
-      if (JemallocNodumpAllocator::IsSupported(&msg)) {
-        Status s = NewJemallocNodumpAllocator(jopts, &allocator);
-        if (s.ok()) {
-          opts.memory_allocator = allocator;
-        }
-      } else {
-        ROCKSDB_GTEST_BYPASS("JEMALLOC not supported");
-      }
-    }
-    std::shared_ptr<SecondaryCache> cache = NewLRUSecondaryCache(opts);
-
-    // Lookup an non-existent key.
-    std::unique_ptr<SecondaryCacheResultHandle> handle0 =
-        cache->Lookup("k0", test_item_creator, true);
-    ASSERT_EQ(handle0, nullptr);
-
-    Random rnd(301);
-    // Insert and Lookup the first item.
-    std::string str1;
-    test::CompressibleString(&rnd, 0.25, 1000, &str1);
-    TestItem item1(str1.data(), str1.length());
-    ASSERT_OK(cache->Insert("k1", &item1, &LRUSecondaryCacheTest::helper_));
-    std::unique_ptr<SecondaryCacheResultHandle> handle1 =
-        cache->Lookup("k1", test_item_creator, true);
-    ASSERT_NE(handle1, nullptr);
-    // delete reinterpret_cast<TestItem*>(handle1->Value());
-    std::unique_ptr<TestItem> val1 =
-        std::unique_ptr<TestItem>(static_cast<TestItem*>(handle1->Value()));
-    ASSERT_NE(val1, nullptr);
-    ASSERT_EQ(memcmp(val1->Buf(), item1.Buf(), item1.Size()), 0);
-
-    // Insert and Lookup the second item.
-    std::string str2;
-    test::CompressibleString(&rnd, 0.5, 1000, &str2);
-    TestItem item2(str2.data(), str2.length());
-    ASSERT_OK(cache->Insert("k2", &item2, &LRUSecondaryCacheTest::helper_));
-    std::unique_ptr<SecondaryCacheResultHandle> handle2 =
-        cache->Lookup("k2", test_item_creator, true);
-    ASSERT_NE(handle2, nullptr);
-    std::unique_ptr<TestItem> val2 =
-        std::unique_ptr<TestItem>(static_cast<TestItem*>(handle2->Value()));
-    ASSERT_NE(val2, nullptr);
-    ASSERT_EQ(memcmp(val2->Buf(), item2.Buf(), item2.Size()), 0);
-
-    // Lookup the first item again to make sure it is still in the cache.
-    std::unique_ptr<SecondaryCacheResultHandle> handle1_1 =
-        cache->Lookup("k1", test_item_creator, true);
-    ASSERT_NE(handle1_1, nullptr);
-    std::unique_ptr<TestItem> val1_1 =
-        std::unique_ptr<TestItem>(static_cast<TestItem*>(handle1_1->Value()));
-    ASSERT_NE(val1_1, nullptr);
-    ASSERT_EQ(memcmp(val1_1->Buf(), item1.Buf(), item1.Size()), 0);
-
-    std::vector<SecondaryCacheResultHandle*> handles = {handle1.get(),
-                                                        handle2.get()};
-    cache->WaitAll(handles);
-
-    cache->Erase("k1");
-    handle1 = cache->Lookup("k1", test_item_creator, true);
-    ASSERT_EQ(handle1, nullptr);
-
-    cache.reset();
-  }
-
-  void FailsTest(bool sec_cache_is_compressed) {
-    LRUSecondaryCacheOptions secondary_cache_opts;
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    secondary_cache_opts.capacity = 1100;
-    secondary_cache_opts.num_shard_bits = 0;
-    secondary_cache_opts.metadata_charge_policy = kDontChargeCacheMetadata;
-    std::shared_ptr<SecondaryCache> cache =
-        NewLRUSecondaryCache(secondary_cache_opts);
-
-    // Insert and Lookup the first item.
-    Random rnd(301);
-    std::string str1(rnd.RandomString(1000));
-    TestItem item1(str1.data(), str1.length());
-    ASSERT_OK(cache->Insert("k1", &item1, &LRUSecondaryCacheTest::helper_));
-    std::unique_ptr<SecondaryCacheResultHandle> handle1 =
-        cache->Lookup("k1", test_item_creator, true);
-    ASSERT_NE(handle1, nullptr);
-    std::unique_ptr<TestItem> val1 =
-        std::unique_ptr<TestItem>(static_cast<TestItem*>(handle1->Value()));
-    ASSERT_NE(val1, nullptr);
-    ASSERT_EQ(memcmp(val1->Buf(), item1.Buf(), item1.Size()), 0);
-
-    // Insert and Lookup the second item.
-    std::string str2(rnd.RandomString(200));
-    TestItem item2(str2.data(), str2.length());
-    // k1 is evicted.
-    ASSERT_OK(cache->Insert("k2", &item2, &LRUSecondaryCacheTest::helper_));
-    std::unique_ptr<SecondaryCacheResultHandle> handle1_1 =
-        cache->Lookup("k1", test_item_creator, true);
-    ASSERT_EQ(handle1_1, nullptr);
-    std::unique_ptr<SecondaryCacheResultHandle> handle2 =
-        cache->Lookup("k2", test_item_creator, true);
-    ASSERT_NE(handle2, nullptr);
-    std::unique_ptr<TestItem> val2 =
-        std::unique_ptr<TestItem>(static_cast<TestItem*>(handle2->Value()));
-    ASSERT_NE(val2, nullptr);
-    ASSERT_EQ(memcmp(val2->Buf(), item2.Buf(), item2.Size()), 0);
-
-    // Create Fails.
-    SetFailCreate(true);
-    std::unique_ptr<SecondaryCacheResultHandle> handle2_1 =
-        cache->Lookup("k2", test_item_creator, true);
-    ASSERT_EQ(handle2_1, nullptr);
-
-    // Save Fails.
-    std::string str3 = rnd.RandomString(10);
-    TestItem item3(str3.data(), str3.length());
-    ASSERT_NOK(
-        cache->Insert("k3", &item3, &LRUSecondaryCacheTest::helper_fail_));
-
-    cache.reset();
-  }
-
-  void BasicIntegrationTest(bool sec_cache_is_compressed) {
-    LRUSecondaryCacheOptions secondary_cache_opts;
-
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    secondary_cache_opts.capacity = 2300;
-    secondary_cache_opts.num_shard_bits = 0;
-    secondary_cache_opts.metadata_charge_policy = kDontChargeCacheMetadata;
-    std::shared_ptr<SecondaryCache> secondary_cache =
-        NewLRUSecondaryCache(secondary_cache_opts);
-    LRUCacheOptions lru_cache_opts(1024, 0, false, 0.5, nullptr,
-                                   kDefaultToAdaptiveMutex,
-                                   kDontChargeCacheMetadata);
-    lru_cache_opts.secondary_cache = secondary_cache;
-    std::shared_ptr<Cache> cache = NewLRUCache(lru_cache_opts);
-    std::shared_ptr<Statistics> stats = CreateDBStatistics();
-
-    Random rnd(301);
-
-    std::string str1 = rnd.RandomString(1010);
-    std::string str1_clone{str1};
-    TestItem* item1 = new TestItem(str1.data(), str1.length());
-    ASSERT_OK(cache->Insert("k1", item1, &LRUSecondaryCacheTest::helper_,
-                            str1.length()));
-
-    std::string str2 = rnd.RandomString(1020);
-    TestItem* item2 = new TestItem(str2.data(), str2.length());
-    // After Insert, lru cache contains k2 and secondary cache contains k1.
-    ASSERT_OK(cache->Insert("k2", item2, &LRUSecondaryCacheTest::helper_,
-                            str2.length()));
-
-    std::string str3 = rnd.RandomString(1020);
-    TestItem* item3 = new TestItem(str3.data(), str3.length());
-    // After Insert, lru cache contains k3 and secondary cache contains k1 and
-    // k2
-    ASSERT_OK(cache->Insert("k3", item3, &LRUSecondaryCacheTest::helper_,
-                            str3.length()));
-
-    Cache::Handle* handle;
-    handle =
-        cache->Lookup("k3", &LRUSecondaryCacheTest::helper_, test_item_creator,
-                      Cache::Priority::LOW, true, stats.get());
-    ASSERT_NE(handle, nullptr);
-    TestItem* val3 = static_cast<TestItem*>(cache->Value(handle));
-    ASSERT_NE(val3, nullptr);
-    ASSERT_EQ(memcmp(val3->Buf(), item3->Buf(), item3->Size()), 0);
-    cache->Release(handle);
-
-    // Lookup an non-existent key.
-    handle =
-        cache->Lookup("k0", &LRUSecondaryCacheTest::helper_, test_item_creator,
-                      Cache::Priority::LOW, true, stats.get());
-    ASSERT_EQ(handle, nullptr);
-
-    // This Lookup should promote k1 and demote k3, so k2 is evicted from the
-    // secondary cache. The lru cache contains k1 and secondary cache contains
-    // k3. item1 was Free(), so it cannot be compared against the item1.
-    handle =
-        cache->Lookup("k1", &LRUSecondaryCacheTest::helper_, test_item_creator,
-                      Cache::Priority::LOW, true, stats.get());
-    ASSERT_NE(handle, nullptr);
-    TestItem* val1_1 = static_cast<TestItem*>(cache->Value(handle));
-    ASSERT_NE(val1_1, nullptr);
-    ASSERT_EQ(memcmp(val1_1->Buf(), str1_clone.data(), str1_clone.size()), 0);
-    cache->Release(handle);
-
-    handle =
-        cache->Lookup("k2", &LRUSecondaryCacheTest::helper_, test_item_creator,
-                      Cache::Priority::LOW, true, stats.get());
-    ASSERT_EQ(handle, nullptr);
-
-    cache.reset();
-    secondary_cache.reset();
-  }
-
-  void BasicIntegrationFailTest(bool sec_cache_is_compressed) {
-    LRUSecondaryCacheOptions secondary_cache_opts;
-
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    secondary_cache_opts.capacity = 2048;
-    secondary_cache_opts.num_shard_bits = 0;
-    secondary_cache_opts.metadata_charge_policy = kDontChargeCacheMetadata;
-    std::shared_ptr<SecondaryCache> secondary_cache =
-        NewLRUSecondaryCache(secondary_cache_opts);
-
-    LRUCacheOptions opts(1024, 0, false, 0.5, nullptr, kDefaultToAdaptiveMutex,
-                         kDontChargeCacheMetadata);
-    opts.secondary_cache = secondary_cache;
-    std::shared_ptr<Cache> cache = NewLRUCache(opts);
-
-    Random rnd(301);
-    std::string str1 = rnd.RandomString(1020);
-    auto item1 =
-        std::unique_ptr<TestItem>(new TestItem(str1.data(), str1.length()));
-    ASSERT_NOK(cache->Insert("k1", item1.get(), nullptr, str1.length()));
-    ASSERT_OK(cache->Insert("k1", item1.get(), &LRUSecondaryCacheTest::helper_,
-                            str1.length()));
-    item1.release();  // Appease clang-analyze "potential memory leak"
-
-    Cache::Handle* handle;
-    handle = cache->Lookup("k2", nullptr, test_item_creator,
-                           Cache::Priority::LOW, true);
-    ASSERT_EQ(handle, nullptr);
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_,
-                           test_item_creator, Cache::Priority::LOW, false);
-    ASSERT_EQ(handle, nullptr);
-
-    cache.reset();
-    secondary_cache.reset();
-  }
-
-  void IntegrationSaveFailTest(bool sec_cache_is_compressed) {
-    LRUSecondaryCacheOptions secondary_cache_opts;
-
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    secondary_cache_opts.capacity = 2048;
-    secondary_cache_opts.num_shard_bits = 0;
-    secondary_cache_opts.metadata_charge_policy = kDontChargeCacheMetadata;
-
-    std::shared_ptr<SecondaryCache> secondary_cache =
-        NewLRUSecondaryCache(secondary_cache_opts);
-
-    LRUCacheOptions opts(1024, 0, false, 0.5, nullptr, kDefaultToAdaptiveMutex,
-                         kDontChargeCacheMetadata);
-    opts.secondary_cache = secondary_cache;
-    std::shared_ptr<Cache> cache = NewLRUCache(opts);
-
-    Random rnd(301);
-    std::string str1 = rnd.RandomString(1020);
-    TestItem* item1 = new TestItem(str1.data(), str1.length());
-    ASSERT_OK(cache->Insert("k1", item1, &LRUSecondaryCacheTest::helper_fail_,
-                            str1.length()));
-    std::string str2 = rnd.RandomString(1020);
-    TestItem* item2 = new TestItem(str2.data(), str2.length());
-    // k1 should be demoted to the secondary cache.
-    ASSERT_OK(cache->Insert("k2", item2, &LRUSecondaryCacheTest::helper_fail_,
-                            str2.length()));
-
-    Cache::Handle* handle;
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_fail_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle, nullptr);
-    cache->Release(handle);
-    // This lookup should fail, since k1 demotion would have failed
-    handle = cache->Lookup("k1", &LRUSecondaryCacheTest::helper_fail_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_EQ(handle, nullptr);
-    // Since k1 didn't get promoted, k2 should still be in cache
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_fail_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle, nullptr);
-    cache->Release(handle);
-
-    cache.reset();
-    secondary_cache.reset();
-  }
-
-  void IntegrationCreateFailTest(bool sec_cache_is_compressed) {
-    LRUSecondaryCacheOptions secondary_cache_opts;
-
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    secondary_cache_opts.capacity = 2048;
-    secondary_cache_opts.num_shard_bits = 0;
-    secondary_cache_opts.metadata_charge_policy = kDontChargeCacheMetadata;
-
-    std::shared_ptr<SecondaryCache> secondary_cache =
-        NewLRUSecondaryCache(secondary_cache_opts);
-
-    LRUCacheOptions opts(1024, 0, false, 0.5, nullptr, kDefaultToAdaptiveMutex,
-                         kDontChargeCacheMetadata);
-    opts.secondary_cache = secondary_cache;
-    std::shared_ptr<Cache> cache = NewLRUCache(opts);
-
-    Random rnd(301);
-    std::string str1 = rnd.RandomString(1020);
-    TestItem* item1 = new TestItem(str1.data(), str1.length());
-    ASSERT_OK(cache->Insert("k1", item1, &LRUSecondaryCacheTest::helper_,
-                            str1.length()));
-
-    std::string str2 = rnd.RandomString(1020);
-    TestItem* item2 = new TestItem(str2.data(), str2.length());
-    // k1 should be demoted to the secondary cache.
-    ASSERT_OK(cache->Insert("k2", item2, &LRUSecondaryCacheTest::helper_,
-                            str2.length()));
-
-    Cache::Handle* handle;
-    SetFailCreate(true);
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle, nullptr);
-    cache->Release(handle);
-    // This lookup should fail, since k1 creation would have failed
-    handle = cache->Lookup("k1", &LRUSecondaryCacheTest::helper_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_EQ(handle, nullptr);
-    // Since k1 didn't get promoted, k2 should still be in cache
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle, nullptr);
-    cache->Release(handle);
-
-    cache.reset();
-    secondary_cache.reset();
-  }
-
-  void IntegrationFullCapacityTest(bool sec_cache_is_compressed) {
-    LRUSecondaryCacheOptions secondary_cache_opts;
-
-    if (sec_cache_is_compressed) {
-      if (!LZ4_Supported()) {
-        ROCKSDB_GTEST_SKIP("This test requires LZ4 support.");
-        secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-      }
-    } else {
-      secondary_cache_opts.compression_type = CompressionType::kNoCompression;
-    }
-
-    secondary_cache_opts.capacity = 2048;
-    secondary_cache_opts.num_shard_bits = 0;
-    secondary_cache_opts.metadata_charge_policy = kDontChargeCacheMetadata;
-
-    std::shared_ptr<SecondaryCache> secondary_cache =
-        NewLRUSecondaryCache(secondary_cache_opts);
-
-    LRUCacheOptions opts(1024, 0, /*_strict_capacity_limit=*/true, 0.5, nullptr,
-                         kDefaultToAdaptiveMutex, kDontChargeCacheMetadata);
-    opts.secondary_cache = secondary_cache;
-    std::shared_ptr<Cache> cache = NewLRUCache(opts);
-
-    Random rnd(301);
-    std::string str1 = rnd.RandomString(1020);
-    TestItem* item1 = new TestItem(str1.data(), str1.length());
-    ASSERT_OK(cache->Insert("k1", item1, &LRUSecondaryCacheTest::helper_,
-                            str1.length()));
-    std::string str2 = rnd.RandomString(1020);
-    TestItem* item2 = new TestItem(str2.data(), str2.length());
-    // k1 should be demoted to the secondary cache.
-    ASSERT_OK(cache->Insert("k2", item2, &LRUSecondaryCacheTest::helper_,
-                            str2.length()));
-
-    Cache::Handle* handle;
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle, nullptr);
-    // k1 promotion should fail due to the block cache being at capacity,
-    // but the lookup should still succeed
-    Cache::Handle* handle2;
-    handle2 = cache->Lookup("k1", &LRUSecondaryCacheTest::helper_,
-                            test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle2, nullptr);
-    // Since k1 didn't get inserted, k2 should still be in cache
-    cache->Release(handle);
-    cache->Release(handle2);
-    handle = cache->Lookup("k2", &LRUSecondaryCacheTest::helper_,
-                           test_item_creator, Cache::Priority::LOW, true);
-    ASSERT_NE(handle, nullptr);
-    cache->Release(handle);
-
-    cache.reset();
-    secondary_cache.reset();
-  }
-
- private:
-  bool fail_create_;
-};
-
-Cache::CacheItemHelper LRUSecondaryCacheTest::helper_(
-    LRUSecondaryCacheTest::SizeCallback, LRUSecondaryCacheTest::SaveToCallback,
-    LRUSecondaryCacheTest::DeletionCallback);
-
-Cache::CacheItemHelper LRUSecondaryCacheTest::helper_fail_(
-    LRUSecondaryCacheTest::SizeCallback,
-    LRUSecondaryCacheTest::SaveToCallbackFail,
-    LRUSecondaryCacheTest::DeletionCallback);
-
-TEST_F(LRUSecondaryCacheTest, BasicTestWithNoCompression) {
-  BasicTest(false, false);
-}
-
-TEST_F(LRUSecondaryCacheTest, BasicTestWithMemoryAllocatorAndNoCompression) {
-  BasicTest(false, true);
-}
-
-TEST_F(LRUSecondaryCacheTest, BasicTestWithCompression) {
-  BasicTest(true, false);
-}
-
-TEST_F(LRUSecondaryCacheTest, BasicTestWithMemoryAllocatorAndCompression) {
-  BasicTest(true, true);
-}
-
-TEST_F(LRUSecondaryCacheTest, FailsTestWithNoCompression) { FailsTest(false); }
-
-TEST_F(LRUSecondaryCacheTest, FailsTestWithCompression) { FailsTest(true); }
-
-TEST_F(LRUSecondaryCacheTest, BasicIntegrationTestWithNoCompression) {
-  BasicIntegrationTest(false);
-}
-
-TEST_F(LRUSecondaryCacheTest, BasicIntegrationTestWithCompression) {
-  BasicIntegrationTest(true);
-}
-
-TEST_F(LRUSecondaryCacheTest, BasicIntegrationFailTestWithNoCompression) {
-  BasicIntegrationFailTest(false);
-}
-
-TEST_F(LRUSecondaryCacheTest, BasicIntegrationFailTestWithCompression) {
-  BasicIntegrationFailTest(true);
-}
-
-TEST_F(LRUSecondaryCacheTest, IntegrationSaveFailTestWithNoCompression) {
-  IntegrationSaveFailTest(false);
-}
-
-TEST_F(LRUSecondaryCacheTest, IntegrationSaveFailTestWithCompression) {
-  IntegrationSaveFailTest(true);
-}
-
-TEST_F(LRUSecondaryCacheTest, IntegrationCreateFailTestWithNoCompression) {
-  IntegrationCreateFailTest(false);
-}
-
-TEST_F(LRUSecondaryCacheTest, IntegrationCreateFailTestWithCompression) {
-  IntegrationCreateFailTest(true);
-}
-
-TEST_F(LRUSecondaryCacheTest, IntegrationFullCapacityTestWithNoCompression) {
-  IntegrationFullCapacityTest(false);
-}
-
-TEST_F(LRUSecondaryCacheTest, IntegrationFullCapacityTestWithCompression) {
-  IntegrationFullCapacityTest(true);
-}
-
-}  // namespace ROCKSDB_NAMESPACE
-
-int main(int argc, char** argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
@@ -104,15 +104,14 @@ bool ShardedCache::Ref(Handle* handle) {
  return GetShard(Shard(hash))->Ref(handle);
 }

-bool ShardedCache::Release(Handle* handle, bool erase_if_last_ref) {
+bool ShardedCache::Release(Handle* handle, bool force_erase) {
  uint32_t hash = GetHash(handle);
-  return GetShard(Shard(hash))->Release(handle, erase_if_last_ref);
+  return GetShard(Shard(hash))->Release(handle, force_erase);
 }

-bool ShardedCache::Release(Handle* handle, bool useful,
-                           bool erase_if_last_ref) {
+bool ShardedCache::Release(Handle* handle, bool useful, bool force_erase) {
  uint32_t hash = GetHash(handle);
-  return GetShard(Shard(hash))->Release(handle, useful, erase_if_last_ref);
+  return GetShard(Shard(hash))->Release(handle, useful, force_erase);
 }

 void ShardedCache::Erase(const Slice& key) {
@@ -37,11 +37,11 @@ class CacheShard {
                                Cache::Priority priority, bool wait,
                                Statistics* stats) = 0;
  virtual bool Release(Cache::Handle* handle, bool useful,
-                       bool erase_if_last_ref) = 0;
+                       bool force_erase) = 0;
  virtual bool IsReady(Cache::Handle* handle) = 0;
  virtual void Wait(Cache::Handle* handle) = 0;
  virtual bool Ref(Cache::Handle* handle) = 0;
-  virtual bool Release(Cache::Handle* handle, bool erase_if_last_ref) = 0;
+  virtual bool Release(Cache::Handle* handle, bool force_erase) = 0;
  virtual void Erase(const Slice& key, uint32_t hash) = 0;
  virtual void SetCapacity(size_t capacity) = 0;
  virtual void SetStrictCapacityLimit(bool strict_capacity_limit) = 0;
@@ -94,11 +94,11 @@ class ShardedCache : public Cache {
                         const CreateCallback& create_cb, Priority priority,
                         bool wait, Statistics* stats = nullptr) override;
  virtual bool Release(Handle* handle, bool useful,
-                       bool erase_if_last_ref = false) override;
+                       bool force_erase = false) override;
  virtual bool IsReady(Handle* handle) override;
  virtual void Wait(Handle* handle) override;
  virtual bool Ref(Handle* handle) override;
-  virtual bool Release(Handle* handle, bool erase_if_last_ref = false) override;
+  virtual bool Release(Handle* handle, bool force_erase = false) override;
  virtual void Erase(const Slice& key) override;
  virtual uint64_t NewId() override;
  virtual size_t GetCapacity() const override;
@@ -12,7 +12,7 @@ fi
 ROOT=".."
 # Fetch right version of gcov
 if [ -d /mnt/gvfs/third-party -a -z "$CXX" ]; then
-  source $ROOT/build_tools/fbcode_config_platform009.sh
+  source $ROOT/build_tools/fbcode_config_platform007.sh
  GCOV=$GCC_BASE/bin/gcov
 else
  GCOV=$(which gcov)
@@ -1,93 +0,0 @@
-# This file is used by Meta-internal infrastructure as well as by Makefile
-
-# When included from Makefile, there are rules to build DB_STRESS_CMD. When
-# used directly with `make -f crashtest.mk ...` there will be no rules to
-# build DB_STRESS_CMD so it must exist prior.
-DB_STRESS_CMD?=./db_stress
-
-include python.mk
-
-CRASHTEST_MAKE=$(MAKE) -f crash_test.mk
-CRASHTEST_PY=$(PYTHON) -u tools/db_crashtest.py --stress_cmd=$(DB_STRESS_CMD)
-
-.PHONY: crash_test crash_test_with_atomic_flush crash_test_with_txn \
-	crash_test_with_best_efforts_recovery crash_test_with_ts \
-	blackbox_crash_test blackbox_crash_test_with_atomic_flush \
-	blackbox_crash_test_with_txn blackbox_crash_test_with_ts \
-	blackbox_crash_test_with_best_efforts_recovery \
-	whitebox_crash_test whitebox_crash_test_with_atomic_flush \
-	whitebox_crash_test_with_txn whitebox_crash_test_with_ts \
-	blackbox_crash_test_with_multiops_wc_txn \
-	blackbox_crash_test_with_multiops_wp_txn
-
-crash_test: $(DB_STRESS_CMD)
-# Do not parallelize
-	$(CRASHTEST_MAKE) whitebox_crash_test
-	$(CRASHTEST_MAKE) blackbox_crash_test
-
-crash_test_with_atomic_flush: $(DB_STRESS_CMD)
-# Do not parallelize
-	$(CRASHTEST_MAKE) whitebox_crash_test_with_atomic_flush
-	$(CRASHTEST_MAKE) blackbox_crash_test_with_atomic_flush
-
-crash_test_with_txn: $(DB_STRESS_CMD)
-# Do not parallelize
-	$(CRASHTEST_MAKE) whitebox_crash_test_with_txn
-	$(CRASHTEST_MAKE) blackbox_crash_test_with_txn
-
-crash_test_with_best_efforts_recovery: blackbox_crash_test_with_best_efforts_recovery
-
-crash_test_with_ts: $(DB_STRESS_CMD)
-# Do not parallelize
-	$(CRASHTEST_MAKE) whitebox_crash_test_with_ts
-	$(CRASHTEST_MAKE) blackbox_crash_test_with_ts
-
-crash_test_with_multiops_wc_txn: $(DB_STRESS_CMD)
-	$(CRASHTEST_MAKE) blackbox_crash_test_with_multiops_wc_txn
-
-crash_test_with_multiops_wp_txn: $(DB_STRESS_CMD)
-	$(CRASHTEST_MAKE) blackbox_crash_test_with_multiops_wp_txn
-
-blackbox_crash_test: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --simple blackbox $(CRASH_TEST_EXT_ARGS)
-	$(CRASHTEST_PY) blackbox $(CRASH_TEST_EXT_ARGS)
-
-blackbox_crash_test_with_atomic_flush: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --cf_consistency blackbox $(CRASH_TEST_EXT_ARGS)
-
-blackbox_crash_test_with_txn: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --txn blackbox $(CRASH_TEST_EXT_ARGS)
-
-blackbox_crash_test_with_best_efforts_recovery: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --test_best_efforts_recovery blackbox $(CRASH_TEST_EXT_ARGS)
-
-blackbox_crash_test_with_ts: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --enable_ts blackbox $(CRASH_TEST_EXT_ARGS)
-
-blackbox_crash_test_with_multiops_wc_txn: $(DB_STRESS_CMD)
-	$(PYTHON) -u tools/db_crashtest.py --test_multiops_txn --write_policy write_committed blackbox $(CRASH_TEST_EXT_ARGS)
-
-blackbox_crash_test_with_multiops_wp_txn: $(DB_STRESS_CMD)
-	$(PYTHON) -u tools/db_crashtest.py --test_multiops_txn --write_policy write_prepared blackbox $(CRASH_TEST_EXT_ARGS)
-
-ifeq ($(CRASH_TEST_KILL_ODD),)
-  CRASH_TEST_KILL_ODD=888887
-endif
-
-whitebox_crash_test: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --simple whitebox --random_kill_odd \
-      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
-	$(CRASHTEST_PY) whitebox  --random_kill_odd \
-      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
-
-whitebox_crash_test_with_atomic_flush: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --cf_consistency whitebox  --random_kill_odd \
-      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
-
-whitebox_crash_test_with_txn: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --txn whitebox --random_kill_odd \
-      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
-
-whitebox_crash_test_with_ts: $(DB_STRESS_CMD)
-	$(CRASHTEST_PY) --enable_ts whitebox --random_kill_odd \
-      $(CRASH_TEST_KILL_ODD) $(CRASH_TEST_EXT_ARGS)
@@ -318,7 +318,6 @@ Status BuildTable(

    // TODO Also check the IO status when create the Iterator.

-    TEST_SYNC_POINT("BuildTable:BeforeOutputValidation");
    if (s.ok() && !empty) {
      // Verify that the table is usable
      // We set for_compaction to false and don't OptimizeForCompactionTableRead
@@ -2297,6 +2297,11 @@ void rocksdb_block_based_options_set_data_block_hash_ratio(
  options->rep.data_block_hash_table_util_ratio = v;
 }

+void rocksdb_block_based_options_set_hash_index_allow_collision(
+    rocksdb_block_based_table_options_t* options, unsigned char v) {
+  options->rep.hash_index_allow_collision = v;
+}
+
 void rocksdb_block_based_options_set_cache_index_and_filter_blocks(
    rocksdb_block_based_table_options_t* options, unsigned char v) {
  options->rep.cache_index_and_filter_blocks = v;
@@ -2448,7 +2448,7 @@ int main(int argc, char** argv) {
    rocksdb_fifo_compaction_options_destroy(fco);
  }

-  StartPhase("backup_engine_option");
+  StartPhase("backupable_db_option");
  {
    rocksdb_backup_engine_options_t* bdo;
    bdo = rocksdb_backup_engine_options_create("path");
@@ -1164,12 +1164,12 @@ Compaction* ColumnFamilyData::CompactRange(
    int output_level, const CompactRangeOptions& compact_range_options,
    const InternalKey* begin, const InternalKey* end,
    InternalKey** compaction_end, bool* conflict,
-    uint64_t max_file_num_to_ignore, const std::string& trim_ts) {
+    uint64_t max_file_num_to_ignore) {
  auto* result = compaction_picker_->CompactRange(
      GetName(), mutable_cf_options, mutable_db_options,
      current_->storage_info(), input_level, output_level,
      compact_range_options, begin, end, compaction_end, conflict,
-      max_file_num_to_ignore, trim_ts);
+      max_file_num_to_ignore);
  if (result != nullptr) {
    result->SetInputVersion(current_);
  }
@@ -413,8 +413,7 @@ class ColumnFamilyData {
                           const CompactRangeOptions& compact_range_options,
                           const InternalKey* begin, const InternalKey* end,
                           InternalKey** compaction_end, bool* manual_conflict,
-                           uint64_t max_file_num_to_ignore,
-                           const std::string& trim_ts);
+                           uint64_t max_file_num_to_ignore);

  CompactionPicker* compaction_picker() { return compaction_picker_.get(); }
  // thread-safe
@@ -138,9 +138,6 @@ TEST_F(CompactFilesTest, MultipleLevel) {
    collector->ClearFlushedFiles();
    ASSERT_OK(db->Put(WriteOptions(), ToString(i), ""));
    ASSERT_OK(db->Flush(FlushOptions()));
-    // Ensure background work is fully finished including listener callbacks
-    // before accessing listener state.
-    ASSERT_OK(static_cast_with_check<DBImpl>(db)->TEST_WaitForBackgroundWork());
    auto l0_files = collector->GetFlushedFiles();
    ASSERT_OK(db->CompactFiles(CompactionOptions(), l0_files, i));

@@ -299,9 +296,6 @@ TEST_F(CompactFilesTest, CapturingPendingFiles) {
    ASSERT_OK(db->Flush(FlushOptions()));
  }

-  // Ensure background work is fully finished including listener callbacks
-  // before accessing listener state.
-  ASSERT_OK(static_cast_with_check<DBImpl>(db)->TEST_WaitForBackgroundWork());
  auto l0_files = collector->GetFlushedFiles();
  EXPECT_EQ(5, l0_files.size());

@@ -420,9 +414,6 @@ TEST_F(CompactFilesTest, SentinelCompressionType) {
    ASSERT_OK(db->Put(WriteOptions(), "key", "val"));
    ASSERT_OK(db->Flush(FlushOptions()));

-    // Ensure background work is fully finished including listener callbacks
-    // before accessing listener state.
-    ASSERT_OK(static_cast_with_check<DBImpl>(db)->TEST_WaitForBackgroundWork());
    auto l0_files = collector->GetFlushedFiles();
    ASSERT_EQ(1, l0_files.size());

@@ -213,8 +213,8 @@ Compaction::Compaction(
    uint32_t _output_path_id, CompressionType _compression,
    CompressionOptions _compression_opts, Temperature _output_temperature,
    uint32_t _max_subcompactions, std::vector<FileMetaData*> _grandparents,
-    bool _manual_compaction, const std::string& _trim_ts, double _score,
-    bool _deletion_compaction, CompactionReason _compaction_reason)
+    bool _manual_compaction, double _score, bool _deletion_compaction,
+    CompactionReason _compaction_reason)
    : input_vstorage_(vstorage),
      start_level_(_inputs[0].level),
      output_level_(_output_level),
@@ -237,7 +237,6 @@ Compaction::Compaction(
      bottommost_level_(IsBottommostLevel(output_level_, vstorage, inputs_)),
      is_full_compaction_(IsFullCompaction(vstorage, inputs_)),
      is_manual_compaction_(_manual_compaction),
-      trim_ts_(_trim_ts),
      is_trivial_move_(false),
      compaction_reason_(_compaction_reason),
      notify_on_compaction_completion_(false) {
@@ -278,9 +277,9 @@ Compaction::~Compaction() {

 bool Compaction::InputCompressionMatchesOutput() const {
  int base_level = input_vstorage_->base_level();
-  bool matches =
-      (GetCompressionType(input_vstorage_, mutable_cf_options_, start_level_,
-                          base_level) == output_compression_);
+  bool matches = (GetCompressionType(immutable_options_, input_vstorage_,
+                                     mutable_cf_options_, start_level_,
+                                     base_level) == output_compression_);
  if (matches) {
    TEST_SYNC_POINT("Compaction::InputCompressionMatchesOutput:Matches");
    return true;
@@ -79,8 +79,8 @@ class Compaction {
             CompressionOptions compression_opts,
             Temperature output_temperature, uint32_t max_subcompactions,
             std::vector<FileMetaData*> grandparents,
-             bool manual_compaction = false, const std::string& trim_ts = "",
-             double score = -1, bool deletion_compaction = false,
+             bool manual_compaction = false, double score = -1,
+             bool deletion_compaction = false,
             CompactionReason compaction_reason = CompactionReason::kUnknown);

  // No copying allowed
@@ -208,8 +208,6 @@ class Compaction {
  // Was this compaction triggered manually by the client?
  bool is_manual_compaction() const { return is_manual_compaction_; }

-  std::string trim_ts() const { return trim_ts_; }
-
  // Used when allow_trivial_move option is set in
  // Universal compaction. If all the input files are
  // non overlapping, then is_trivial_move_ variable
@@ -387,9 +385,6 @@ class Compaction {
  // Is this compaction requested by the client?
  const bool is_manual_compaction_;

-  // The data with timestamp > trim_ts_ will be removed
-  const std::string trim_ts_;
-
  // True if we can do trivial move in Universal multi level
  // compaction
  bool is_trivial_move_;
@@ -31,7 +31,6 @@
 #include "db/dbformat.h"
 #include "db/error_handler.h"
 #include "db/event_helpers.h"
-#include "db/history_trimming_iterator.h"
 #include "db/log_reader.h"
 #include "db/log_writer.h"
 #include "db/memtable.h"
@@ -430,8 +429,7 @@ CompactionJob::CompactionJob(
    const std::atomic<int>* manual_compaction_paused,
    const std::atomic<bool>* manual_compaction_canceled,
    const std::string& db_id, const std::string& db_session_id,
-    std::string full_history_ts_low, std::string trim_ts,
-    BlobFileCompletionCallback* blob_callback)
+    std::string full_history_ts_low, BlobFileCompletionCallback* blob_callback)
    : compact_(new CompactionState(compaction)),
      compaction_stats_(compaction->compaction_reason(), 1),
      db_options_(db_options),
@@ -470,7 +468,6 @@ CompactionJob::CompactionJob(
      measure_io_stats_(measure_io_stats),
      thread_pri_(thread_pri),
      full_history_ts_low_(std::move(full_history_ts_low)),
-      trim_ts_(std::move(trim_ts)),
      blob_callback_(blob_callback) {
  assert(compaction_job_stats_ != nullptr);
  assert(log_buffer_ != nullptr);
@@ -1341,8 +1338,6 @@ void CompactionJob::ProcessKeyValueCompaction(SubcompactionState* sub_compact) {
  CompactionRangeDelAggregator range_del_agg(&cfd->internal_comparator(),
                                             existing_snapshots_);

-  // TODO: since we already use C++17, should use
-  // std::optional<const Slice> instead.
  const Slice* const start = sub_compact->start;
  const Slice* const end = sub_compact->end;

@@ -1364,13 +1359,9 @@ void CompactionJob::ProcessKeyValueCompaction(SubcompactionState* sub_compact) {

  // Although the v2 aggregator is what the level iterator(s) know about,
  // the AddTombstones calls will be propagated down to the v1 aggregator.
-  std::unique_ptr<InternalIterator> raw_input(versions_->MakeInputIterator(
-      read_options, sub_compact->compaction, &range_del_agg,
-      file_options_for_read_,
-      (start == nullptr) ? std::optional<const Slice>{}
-                         : std::optional<const Slice>{*start},
-      (end == nullptr) ? std::optional<const Slice>{}
-                       : std::optional<const Slice>{*end}));
+  std::unique_ptr<InternalIterator> raw_input(
+      versions_->MakeInputIterator(read_options, sub_compact->compaction,
+                                   &range_del_agg, file_options_for_read_));
  InternalIterator* input = raw_input.get();

  IterKey start_ikey;
@@ -1389,28 +1380,21 @@ void CompactionJob::ProcessKeyValueCompaction(SubcompactionState* sub_compact) {

  std::unique_ptr<InternalIterator> clip;
  if (start || end) {
-    clip = std::make_unique<ClippingIterator>(
+    clip.reset(new ClippingIterator(
        raw_input.get(), start ? &start_slice : nullptr,
-        end ? &end_slice : nullptr, &cfd->internal_comparator());
+        end ? &end_slice : nullptr, &cfd->internal_comparator()));
    input = clip.get();
  }

  std::unique_ptr<InternalIterator> blob_counter;

  if (sub_compact->compaction->DoesInputReferenceBlobFiles()) {
-    sub_compact->blob_garbage_meter = std::make_unique<BlobGarbageMeter>();
-    blob_counter = std::make_unique<BlobCountingIterator>(
-        input, sub_compact->blob_garbage_meter.get());
+    sub_compact->blob_garbage_meter.reset(new BlobGarbageMeter);
+    blob_counter.reset(
+        new BlobCountingIterator(input, sub_compact->blob_garbage_meter.get()));
    input = blob_counter.get();
  }

-  std::unique_ptr<InternalIterator> trim_history_iter;
-  if (cfd->user_comparator()->timestamp_size() > 0 && !trim_ts_.empty()) {
-    trim_history_iter = std::make_unique<HistoryTrimmingIterator>(
-        input, cfd->user_comparator(), trim_ts_);
-    input = trim_history_iter.get();
-  }
-
  input->SeekToFirst();

  AutoThreadOperationStageUpdater stage_updater(
@@ -82,7 +82,7 @@ class CompactionJob {
      const std::atomic<int>* manual_compaction_paused = nullptr,
      const std::atomic<bool>* manual_compaction_canceled = nullptr,
      const std::string& db_id = "", const std::string& db_session_id = "",
-      std::string full_history_ts_low = "", std::string trim_ts = "",
+      std::string full_history_ts_low = "",
      BlobFileCompletionCallback* blob_callback = nullptr);

  virtual ~CompactionJob();
@@ -226,7 +226,6 @@ class CompactionJob {
  std::vector<uint64_t> sizes_;
  Env::Priority thread_pri_;
  std::string full_history_ts_low_;
-  std::string trim_ts_;
  BlobFileCompletionCallback* blob_callback_;

  uint64_t GetCompactionId(SubcompactionState* sub_compact);
@@ -100,7 +100,8 @@ bool FindIntraL0Compaction(const std::vector<FileMetaData*>& level_files,
 // If enable_compression is false, then compression is always disabled no
 // matter what the values of the other two parameters are.
 // Otherwise, the compression type is determined based on options and level.
-CompressionType GetCompressionType(const VersionStorageInfo* vstorage,
+CompressionType GetCompressionType(const ImmutableCFOptions& ioptions,
+                                   const VersionStorageInfo* vstorage,
                                   const MutableCFOptions& mutable_cf_options,
                                   int level, int base_level,
                                   const bool enable_compression) {
@@ -117,19 +118,17 @@ CompressionType GetCompressionType(const VersionStorageInfo* vstorage,
  }
  // If the user has specified a different compression level for each level,
  // then pick the compression for that level.
-  if (!mutable_cf_options.compression_per_level.empty()) {
+  if (!ioptions.compression_per_level.empty()) {
    assert(level == 0 || level >= base_level);
    int idx = (level == 0) ? 0 : level - base_level + 1;

-    const int n =
-        static_cast<int>(mutable_cf_options.compression_per_level.size()) - 1;
+    const int n = static_cast<int>(ioptions.compression_per_level.size()) - 1;
    // It is possible for level_ to be -1; in that case, we use level
    // 0's compression.  This occurs mostly in backwards compatibility
    // situations when the builder doesn't know what level the file
    // belongs to.  Likewise, if level is beyond the end of the
    // specified compression levels, use the last value.
-    return mutable_cf_options
-        .compression_per_level[std::max(0, std::min(idx, n))];
+    return ioptions.compression_per_level[std::max(0, std::min(idx, n))];
  } else {
    return mutable_cf_options.compression;
  }
@@ -348,8 +347,9 @@ Compaction* CompactionPicker::CompactFiles(
    } else {
      base_level = 1;
    }
-    compression_type = GetCompressionType(vstorage, mutable_cf_options,
-                                          output_level, base_level);
+    compression_type =
+        GetCompressionType(ioptions_, vstorage, mutable_cf_options,
+                           output_level, base_level);
  } else {
    // TODO(ajkr): `CompactionOptions` offers configurable `CompressionType`
    // without configurable `CompressionOptions`, which is inconsistent.
@@ -571,7 +571,7 @@ Compaction* CompactionPicker::CompactRange(
    int input_level, int output_level,
    const CompactRangeOptions& compact_range_options, const InternalKey* begin,
    const InternalKey* end, InternalKey** compaction_end, bool* manual_conflict,
-    uint64_t max_file_num_to_ignore, const std::string& trim_ts) {
+    uint64_t max_file_num_to_ignore) {
  // CompactionPickerFIFO has its own implementation of compact range
  assert(ioptions_.compaction_style != kCompactionStyleFIFO);

@@ -637,10 +637,12 @@ Compaction* CompactionPicker::CompactRange(
                            ioptions_.compaction_style),
        /* max_compaction_bytes */ LLONG_MAX,
        compact_range_options.target_path_id,
-        GetCompressionType(vstorage, mutable_cf_options, output_level, 1),
+        GetCompressionType(ioptions_, vstorage, mutable_cf_options,
+                           output_level, 1),
        GetCompressionOptions(mutable_cf_options, vstorage, output_level),
        Temperature::kUnknown, compact_range_options.max_subcompactions,
-        /* grandparents */ {}, /* is manual */ true, trim_ts);
+        /* grandparents */ {},
+        /* is manual */ true);
    RegisterCompaction(c);
    vstorage->ComputeCompactionScore(ioptions_, mutable_cf_options);
    return c;
@@ -814,12 +816,12 @@ Compaction* CompactionPicker::CompactRange(
                          ioptions_.level_compaction_dynamic_level_bytes),
      mutable_cf_options.max_compaction_bytes,
      compact_range_options.target_path_id,
-      GetCompressionType(vstorage, mutable_cf_options, output_level,
+      GetCompressionType(ioptions_, vstorage, mutable_cf_options, output_level,
                         vstorage->base_level()),
      GetCompressionOptions(mutable_cf_options, vstorage, output_level),
      Temperature::kUnknown, compact_range_options.max_subcompactions,
      std::move(grandparents),
-      /* is manual compaction */ true, trim_ts);
+      /* is manual compaction */ true);

  TEST_SYNC_POINT_CALLBACK("CompactionPicker::CompactRange:Return", compaction);
  RegisterCompaction(compaction);
@@ -78,7 +78,7 @@ class CompactionPicker {
      const CompactRangeOptions& compact_range_options,
      const InternalKey* begin, const InternalKey* end,
      InternalKey** compaction_end, bool* manual_conflict,
-      uint64_t max_file_num_to_ignore, const std::string& trim_ts);
+      uint64_t max_file_num_to_ignore);

  // The maximum allowed output level.  Default value is NumberLevels() - 1.
  virtual int MaxOutputLevel() const { return NumberLevels() - 1; }
@@ -270,8 +270,7 @@ class NullCompactionPicker : public CompactionPicker {
                           const InternalKey* /*end*/,
                           InternalKey** /*compaction_end*/,
                           bool* /*manual_conflict*/,
-                           uint64_t /*max_file_num_to_ignore*/,
-                           const std::string& /*trim_ts*/) override {
+                           uint64_t /*max_file_num_to_ignore*/) override {
    return nullptr;
  }

@@ -305,7 +304,8 @@ bool FindIntraL0Compaction(
    CompactionInputFiles* comp_inputs,
    SequenceNumber earliest_mem_seqno = kMaxSequenceNumber);

-CompressionType GetCompressionType(const VersionStorageInfo* vstorage,
+CompressionType GetCompressionType(const ImmutableCFOptions& ioptions,
+                                   const VersionStorageInfo* vstorage,
                                   const MutableCFOptions& mutable_cf_options,
                                   int level, int base_level,
                                   const bool enable_compression = true);
@@ -115,7 +115,7 @@ Compaction* FIFOCompactionPicker::PickTTLCompaction(
      std::move(inputs), 0, 0, 0, 0, kNoCompression,
      mutable_cf_options.compression_opts, Temperature::kUnknown,
      /* max_subcompactions */ 0, {}, /* is manual */ false,
-      /* trim_ts */ "", vstorage->CompactionScore(0),
+      vstorage->CompactionScore(0),
      /* is deletion compaction */ true, CompactionReason::kFIFOTtl);
  return c;
 }
@@ -157,8 +157,8 @@ Compaction* FIFOCompactionPicker::PickSizeCompaction(
            0 /* max compaction bytes, not applicable */,
            0 /* output path ID */, mutable_cf_options.compression,
            mutable_cf_options.compression_opts, Temperature::kUnknown,
-            0 /* max_subcompactions */, {}, /* is manual */ false,
-            /* trim_ts */ "", vstorage->CompactionScore(0),
+            0 /* max_subcompactions */, {},
+            /* is manual */ false, vstorage->CompactionScore(0),
            /* is deletion compaction */ false,
            CompactionReason::kFIFOReduceNumFiles);
        return c;
@@ -208,7 +208,7 @@ Compaction* FIFOCompactionPicker::PickSizeCompaction(
      std::move(inputs), 0, 0, 0, 0, kNoCompression,
      mutable_cf_options.compression_opts, Temperature::kUnknown,
      /* max_subcompactions */ 0, {}, /* is manual */ false,
-      /* trim_ts */ "", vstorage->CompactionScore(0),
+      vstorage->CompactionScore(0),
      /* is deletion compaction */ true, CompactionReason::kFIFOMaxSize);
  return c;
 }
@@ -313,7 +313,7 @@ Compaction* FIFOCompactionPicker::PickCompactionToWarm(
      0 /* max compaction bytes, not applicable */, 0 /* output path ID */,
      mutable_cf_options.compression, mutable_cf_options.compression_opts,
      Temperature::kWarm,
-      /* max_subcompactions */ 0, {}, /* is manual */ false, /* trim_ts */ "",
+      /* max_subcompactions */ 0, {}, /* is manual */ false,
      vstorage->CompactionScore(0),
      /* is deletion compaction */ false, CompactionReason::kChangeTemperature);
  return c;
@@ -349,7 +349,7 @@ Compaction* FIFOCompactionPicker::CompactRange(
    const CompactRangeOptions& /*compact_range_options*/,
    const InternalKey* /*begin*/, const InternalKey* /*end*/,
    InternalKey** compaction_end, bool* /*manual_conflict*/,
-    uint64_t /*max_file_num_to_ignore*/, const std::string& /*trim_ts*/) {
+    uint64_t /*max_file_num_to_ignore*/) {
 #ifdef NDEBUG
  (void)input_level;
  (void)output_level;
@@ -32,7 +32,7 @@ class FIFOCompactionPicker : public CompactionPicker {
      const CompactRangeOptions& compact_range_options,
      const InternalKey* begin, const InternalKey* end,
      InternalKey** compaction_end, bool* manual_conflict,
-      uint64_t max_file_num_to_ignore, const std::string& trim_ts) override;
+      uint64_t max_file_num_to_ignore) override;

  // The maximum allowed output level.  Always returns 0.
  virtual int MaxOutputLevel() const override { return 0; }
@@ -343,13 +343,12 @@ Compaction* LevelCompactionBuilder::GetCompaction() {
                          ioptions_.level_compaction_dynamic_level_bytes),
      mutable_cf_options_.max_compaction_bytes,
      GetPathId(ioptions_, mutable_cf_options_, output_level_),
-      GetCompressionType(vstorage_, mutable_cf_options_, output_level_,
-                         vstorage_->base_level()),
+      GetCompressionType(ioptions_, vstorage_, mutable_cf_options_,
+                         output_level_, vstorage_->base_level()),
      GetCompressionOptions(mutable_cf_options_, vstorage_, output_level_),
      Temperature::kUnknown,
      /* max_subcompactions */ 0, std::move(grandparents_), is_manual_,
-      /* trim_ts */ "", start_level_score_, false /* deletion_compaction */,
-      compaction_reason_);
+      start_level_score_, false /* deletion_compaction */, compaction_reason_);

  // If it's level 0 compaction, make sure we don't execute any other level 0
  // compactions in parallel
@@ -2648,13 +2648,12 @@ TEST_F(CompactionPickerTest, UniversalMarkedManualCompaction) {
  ASSERT_EQ(3U, vstorage_->FilesMarkedForCompaction().size());

  bool manual_conflict = false;
-  InternalKey* manual_end = nullptr;
+  InternalKey* manual_end = NULL;
  std::unique_ptr<Compaction> compaction(
      universal_compaction_picker.CompactRange(
          cf_name_, mutable_cf_options_, mutable_db_options_, vstorage_.get(),
-          ColumnFamilyData::kCompactAllLevels, 6, CompactRangeOptions(),
-          nullptr, nullptr, &manual_end, &manual_conflict, port::kMaxUint64,
-          ""));
+          ColumnFamilyData::kCompactAllLevels, 6, CompactRangeOptions(), NULL,
+          NULL, &manual_end, &manual_conflict, port::kMaxUint64));

  ASSERT_TRUE(compaction);

@@ -746,19 +746,19 @@ Compaction* UniversalCompactionBuilder::PickCompactionToReduceSortedRuns(
  } else {
    compaction_reason = CompactionReason::kUniversalSortedRunNum;
  }
-  return new Compaction(vstorage_, ioptions_, mutable_cf_options_,
-                        mutable_db_options_, std::move(inputs), output_level,
-                        MaxFileSizeForLevel(mutable_cf_options_, output_level,
-                                            kCompactionStyleUniversal),
-                        GetMaxOverlappingBytes(), path_id,
-                        GetCompressionType(vstorage_, mutable_cf_options_,
-                                           start_level, 1, enable_compression),
-                        GetCompressionOptions(mutable_cf_options_, vstorage_,
-                                              start_level, enable_compression),
-                        Temperature::kUnknown,
-                        /* max_subcompactions */ 0, grandparents,
-                        /* is manual */ false, /* trim_ts */ "", score_,
-                        false /* deletion_compaction */, compaction_reason);
+  return new Compaction(
+      vstorage_, ioptions_, mutable_cf_options_, mutable_db_options_,
+      std::move(inputs), output_level,
+      MaxFileSizeForLevel(mutable_cf_options_, output_level,
+                          kCompactionStyleUniversal),
+      GetMaxOverlappingBytes(), path_id,
+      GetCompressionType(ioptions_, vstorage_, mutable_cf_options_, start_level,
+                         1, enable_compression),
+      GetCompressionOptions(mutable_cf_options_, vstorage_, start_level,
+                            enable_compression),
+      Temperature::kUnknown,
+      /* max_subcompactions */ 0, grandparents, /* is manual */ false, score_,
+      false /* deletion_compaction */, compaction_reason);
 }

 // Look at overall size amplification. If size amplification
@@ -1076,13 +1076,13 @@ Compaction* UniversalCompactionBuilder::PickIncrementalForReduceSizeAmp(
      MaxFileSizeForLevel(mutable_cf_options_, output_level,
                          kCompactionStyleUniversal),
      GetMaxOverlappingBytes(), path_id,
-      GetCompressionType(vstorage_, mutable_cf_options_, output_level, 1,
-                         true /* enable_compression */),
+      GetCompressionType(ioptions_, vstorage_, mutable_cf_options_,
+                         output_level, 1, true /* enable_compression */),
      GetCompressionOptions(mutable_cf_options_, vstorage_, output_level,
                            true /* enable_compression */),
      Temperature::kUnknown,
      /* max_subcompactions */ 0, /* grandparents */ {}, /* is manual */ false,
-      /* trim_ts */ "", score_, false /* deletion_compaction */,
+      score_, false /* deletion_compaction */,
      CompactionReason::kUniversalSizeAmplification);
 }

@@ -1220,11 +1220,12 @@ Compaction* UniversalCompactionBuilder::PickDeleteTriggeredCompaction() {
      MaxFileSizeForLevel(mutable_cf_options_, output_level,
                          kCompactionStyleUniversal),
      /* max_grandparent_overlap_bytes */ GetMaxOverlappingBytes(), path_id,
-      GetCompressionType(vstorage_, mutable_cf_options_, output_level, 1),
+      GetCompressionType(ioptions_, vstorage_, mutable_cf_options_,
+                         output_level, 1),
      GetCompressionOptions(mutable_cf_options_, vstorage_, output_level),
      Temperature::kUnknown,
-      /* max_subcompactions */ 0, grandparents, /* is manual */ false,
-      /* trim_ts */ "", score_, false /* deletion_compaction */,
+      /* max_subcompactions */ 0, grandparents, /* is manual */ false, score_,
+      false /* deletion_compaction */,
      CompactionReason::kFilesMarkedForCompaction);
 }

@@ -1293,14 +1294,13 @@ Compaction* UniversalCompactionBuilder::PickCompactionToOldest(
      MaxFileSizeForLevel(mutable_cf_options_, output_level,
                          kCompactionStyleUniversal),
      GetMaxOverlappingBytes(), path_id,
-      GetCompressionType(vstorage_, mutable_cf_options_, output_level, 1,
-                         true /* enable_compression */),
+      GetCompressionType(ioptions_, vstorage_, mutable_cf_options_,
+                         output_level, 1, true /* enable_compression */),
      GetCompressionOptions(mutable_cf_options_, vstorage_, output_level,
                            true /* enable_compression */),
      Temperature::kUnknown,
      /* max_subcompactions */ 0, /* grandparents */ {}, /* is manual */ false,
-      /* trim_ts */ "", score_, false /* deletion_compaction */,
-      compaction_reason);
+      score_, false /* deletion_compaction */, compaction_reason);
 }

 Compaction* UniversalCompactionBuilder::PickPeriodicCompaction() {
@@ -17,11 +17,8 @@
 #include "db/db_test_util.h"
 #include "options/options_helper.h"
 #include "port/stack_trace.h"
-#include "rocksdb/advanced_options.h"
 #include "rocksdb/convenience.h"
-#include "rocksdb/filter_policy.h"
 #include "rocksdb/perf_context.h"
-#include "rocksdb/statistics.h"
 #include "rocksdb/table.h"
 #include "table/block_based/block_based_table_reader.h"
 #include "table/block_based/filter_policy_internal.h"
@@ -801,87 +798,83 @@ TEST_F(DBBloomFilterTest, BloomFilterRate) {
  }
 }

-namespace {
-struct CompatibilityConfig {
-  std::shared_ptr<const FilterPolicy> policy;
-  bool partitioned;
-  uint32_t format_version;
-
-  void SetInTableOptions(BlockBasedTableOptions* table_options) {
-    table_options->filter_policy = policy;
-    table_options->partition_filters = partitioned;
-    if (partitioned) {
-      table_options->index_type =
-          BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch;
-    } else {
-      table_options->index_type =
-          BlockBasedTableOptions::IndexType::kBinarySearch;
-    }
-    table_options->format_version = format_version;
-  }
-};
-// High bits per key -> almost no FPs
-std::shared_ptr<const FilterPolicy> kCompatibilityBloomPolicy{
-    NewBloomFilterPolicy(20)};
-// bloom_before_level=-1 -> always use Ribbon
-std::shared_ptr<const FilterPolicy> kCompatibilityRibbonPolicy{
-    NewRibbonFilterPolicy(20, -1)};
-
-std::vector<CompatibilityConfig> kCompatibilityConfigs = {
-    {Create(20, kDeprecatedBlock), false,
-     BlockBasedTableOptions().format_version},
-    {kCompatibilityBloomPolicy, false, BlockBasedTableOptions().format_version},
-    {kCompatibilityBloomPolicy, true, BlockBasedTableOptions().format_version},
-    {kCompatibilityBloomPolicy, false, /* legacy Bloom */ 4U},
-    {kCompatibilityRibbonPolicy, false,
-     BlockBasedTableOptions().format_version},
-    {kCompatibilityRibbonPolicy, true, BlockBasedTableOptions().format_version},
-};
-}  // namespace
-
 TEST_F(DBBloomFilterTest, BloomFilterCompatibility) {
  Options options = CurrentOptions();
  options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
-  options.level0_file_num_compaction_trigger =
-      static_cast<int>(kCompatibilityConfigs.size()) + 1;
-  options.max_open_files = -1;
+  BlockBasedTableOptions table_options;
+  table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
+  options.table_factory.reset(NewBlockBasedTableFactory(table_options));

-  Close();
+  // Create with block based filter
+  CreateAndReopenWithCF({"pikachu"}, options);

-  // Create one file for each kind of filter. Each file covers a distinct key
-  // range.
-  for (size_t i = 0; i < kCompatibilityConfigs.size(); ++i) {
-    BlockBasedTableOptions table_options;
-    kCompatibilityConfigs[i].SetInTableOptions(&table_options);
-    ASSERT_TRUE(table_options.filter_policy != nullptr);
-    options.table_factory.reset(NewBlockBasedTableFactory(table_options));
-    Reopen(options);
-
-    std::string prefix = ToString(i) + "_";
-    ASSERT_OK(Put(prefix + "A", "val"));
-    ASSERT_OK(Put(prefix + "Z", "val"));
-    ASSERT_OK(Flush());
+  const int maxKey = 10000;
+  for (int i = 0; i < maxKey; i++) {
+    ASSERT_OK(Put(1, Key(i), Key(i)));
  }
+  ASSERT_OK(Put(1, Key(maxKey + 55555), Key(maxKey + 55555)));
+  Flush(1);

-  // Test filter is used between each pair of {reader,writer} configurations,
-  // because any built-in FilterPolicy should be able to read filters from any
-  // other built-in FilterPolicy
-  for (size_t i = 0; i < kCompatibilityConfigs.size(); ++i) {
+  // Check db with full filter
+  table_options.filter_policy.reset(NewBloomFilterPolicy(10, false));
+  options.table_factory.reset(NewBlockBasedTableFactory(table_options));
+  ReopenWithColumnFamilies({"default", "pikachu"}, options);
+
+  // Check if they can be found
+  for (int i = 0; i < maxKey; i++) {
+    ASSERT_EQ(Key(i), Get(1, Key(i)));
+  }
+  ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
+
+  // Check db with partitioned full filter
+  table_options.partition_filters = true;
+  table_options.index_type =
+      BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch;
+  table_options.filter_policy.reset(NewBloomFilterPolicy(10, false));
+  options.table_factory.reset(NewBlockBasedTableFactory(table_options));
+  ReopenWithColumnFamilies({"default", "pikachu"}, options);
+
+  // Check if they can be found
+  for (int i = 0; i < maxKey; i++) {
+    ASSERT_EQ(Key(i), Get(1, Key(i)));
+  }
+  ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
+}
+
+TEST_F(DBBloomFilterTest, BloomFilterReverseCompatibility) {
+  for (bool partition_filters : {true, false}) {
+    Options options = CurrentOptions();
+    options.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
    BlockBasedTableOptions table_options;
-    kCompatibilityConfigs[i].SetInTableOptions(&table_options);
-    options.table_factory.reset(NewBlockBasedTableFactory(table_options));
-    Reopen(options);
-    for (size_t j = 0; j < kCompatibilityConfigs.size(); ++j) {
-      std::string prefix = ToString(j) + "_";
-      ASSERT_EQ("val", Get(prefix + "A"));  // Filter positive
-      ASSERT_EQ("val", Get(prefix + "Z"));  // Filter positive
-      // Filter negative, with high probability
-      ASSERT_EQ("NOT_FOUND", Get(prefix + "Q"));
-      // FULL_POSITIVE does not include block-based filter case (j == 0)
-      EXPECT_EQ(TestGetAndResetTickerCount(options, BLOOM_FILTER_FULL_POSITIVE),
-                j == 0 ? 0 : 2);
-      EXPECT_EQ(TestGetAndResetTickerCount(options, BLOOM_FILTER_USEFUL), 1);
+    if (partition_filters) {
+      table_options.partition_filters = true;
+      table_options.index_type =
+          BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch;
    }
+    table_options.filter_policy.reset(NewBloomFilterPolicy(10, false));
+    options.table_factory.reset(NewBlockBasedTableFactory(table_options));
+    DestroyAndReopen(options);
+
+    // Create with full filter
+    CreateAndReopenWithCF({"pikachu"}, options);
+
+    const int maxKey = 10000;
+    for (int i = 0; i < maxKey; i++) {
+      ASSERT_OK(Put(1, Key(i), Key(i)));
+    }
+    ASSERT_OK(Put(1, Key(maxKey + 55555), Key(maxKey + 55555)));
+    Flush(1);
+
+    // Check db with block_based filter
+    table_options.filter_policy.reset(NewBloomFilterPolicy(10, true));
+    options.table_factory.reset(NewBlockBasedTableFactory(table_options));
+    ReopenWithColumnFamilies({"default", "pikachu"}, options);
+
+    // Check if they can be found
+    for (int i = 0; i < maxKey; i++) {
+      ASSERT_EQ(Key(i), Get(1, Key(i)));
+    }
+    ASSERT_EQ(TestGetTickerCount(options, BLOOM_FILTER_USEFUL), 0);
  }
 }

@@ -926,7 +919,7 @@ class FilterConstructResPeakTrackingCache : public CacheWrapper {
  }

  using Cache::Release;
-  bool Release(Handle* handle, bool erase_if_last_ref = false) override {
+  bool Release(Handle* handle, bool force_erase = false) override {
    auto deleter = GetDeleter(handle);
    if (deleter == kNoopDeleterForFilterConstruction) {
      if (!last_peak_tracked_) {
@@ -936,7 +929,7 @@ class FilterConstructResPeakTrackingCache : public CacheWrapper {
      }
      cur_cache_res_ -= GetCharge(handle);
    }
-    bool is_successful = target_->Release(handle, erase_if_last_ref);
+    bool is_successful = target_->Release(handle, force_erase);
    return is_successful;
  }

@@ -959,8 +952,8 @@ class FilterConstructResPeakTrackingCache : public CacheWrapper {

 const Cache::DeleterFn
    FilterConstructResPeakTrackingCache::kNoopDeleterForFilterConstruction =
-        CacheReservationManagerImpl<
-            CacheEntryRole::kFilterConstruction>::TEST_GetNoopDeleterForRole();
+        CacheReservationManager::TEST_GetNoopDeleterForRole<
+            CacheEntryRole::kFilterConstruction>();

 // To align with the type of hash entry being reserved in implementation.
 using FilterConstructionReserveMemoryHash = uint64_t;
@@ -990,9 +983,7 @@ class DBFilterConstructionReserveMemoryTestWithParam
      // trigger at least 1 dummy entry reservation each for hash entries and
      // final filter, we need a large number of keys to ensure we have at least
      // two partitions.
-      num_key_ = 18 *
-                 CacheReservationManagerImpl<
-                     CacheEntryRole::kFilterConstruction>::GetDummyEntrySize() /
+      num_key_ = 18 * CacheReservationManager::GetDummyEntrySize() /
                 sizeof(FilterConstructionReserveMemoryHash);
    } else if (policy_ == kFastLocalBloom) {
      // For Bloom Filter + FullFilter case, since we design the num_key_ to
@@ -1002,9 +993,7 @@ class DBFilterConstructionReserveMemoryTestWithParam
      // behavior and we don't need a large number of keys to verify we
      // indeed charge the final filter for cache reservation, even though final
      // filter is a lot smaller than hash entries.
-      num_key_ = 1 *
-                 CacheReservationManagerImpl<
-                     CacheEntryRole::kFilterConstruction>::GetDummyEntrySize() /
+      num_key_ = 1 * CacheReservationManager::GetDummyEntrySize() /
                 sizeof(FilterConstructionReserveMemoryHash);
    } else {
      // For Ribbon Filter + FullFilter case, we need a large enough number of
@@ -1012,9 +1001,7 @@ class DBFilterConstructionReserveMemoryTestWithParam
      // reservation will trigger at least another dummy entry (or equivalently
      // to saying, causing another peak in cache reservation) as banding
      // reservation might not be a multiple of dummy entry.
-      num_key_ = 12 *
-                 CacheReservationManagerImpl<
-                     CacheEntryRole::kFilterConstruction>::GetDummyEntrySize() /
+      num_key_ = 12 * CacheReservationManager::GetDummyEntrySize() /
                 sizeof(FilterConstructionReserveMemoryHash);
    }
  }
@@ -1169,8 +1156,8 @@ TEST_P(DBFilterConstructionReserveMemoryTestWithParam, ReserveMemory) {
    return;
  }

-  const std::size_t kDummyEntrySize = CacheReservationManagerImpl<
-      CacheEntryRole::kFilterConstruction>::GetDummyEntrySize();
+  const std::size_t kDummyEntrySize =
+      CacheReservationManager::GetDummyEntrySize();

  const std::size_t predicted_hash_entries_cache_res =
      num_key * sizeof(FilterConstructionReserveMemoryHash);
@@ -1358,12 +1345,9 @@ TEST_P(DBFilterConstructionReserveMemoryTestWithParam, ReserveMemory) {
     *
     */
    if (!partition_filters) {
-      ASSERT_GE(
-          std::floor(
-              1.0 * predicted_final_filter_cache_res /
-              CacheReservationManagerImpl<
-                  CacheEntryRole::kFilterConstruction>::GetDummyEntrySize()),
-          1)
+      ASSERT_GE(std::floor(1.0 * predicted_final_filter_cache_res /
+                           CacheReservationManager::GetDummyEntrySize()),
+                1)
          << "Final filter cache reservation too small for this test - please "
             "increase the number of keys";
      if (!detect_filter_construct_corruption) {
@@ -1556,93 +1540,6 @@ TEST_P(DBFilterConstructionCorruptionTestWithParam, DetectCorruption) {
      "TamperFilter");
 }

-// RocksDB lite does not support dynamic options
-#ifndef ROCKSDB_LITE
-TEST_P(DBFilterConstructionCorruptionTestWithParam,
-       DynamicallyTurnOnAndOffDetectConstructCorruption) {
-  Options options = CurrentOptions();
-  BlockBasedTableOptions table_options = GetBlockBasedTableOptions();
-  // We intend to turn on
-  // table_options.detect_filter_construct_corruption dynamically
-  // therefore we override this test parmater's value
-  table_options.detect_filter_construct_corruption = false;
-
-  options.table_factory.reset(NewBlockBasedTableFactory(table_options));
-  options.create_if_missing = true;
-
-  int num_key = static_cast<int>(GetNumKey());
-  Status s;
-
-  DestroyAndReopen(options);
-
-  // Case 1: !table_options.detect_filter_construct_corruption
-  for (int i = 0; i < num_key; i++) {
-    ASSERT_OK(Put(Key(i), Key(i)));
-  }
-
-  SyncPoint::GetInstance()->SetCallBack(
-      "XXPH3FilterBitsBuilder::Finish::TamperHashEntries", [&](void* arg) {
-        std::deque<uint64_t>* hash_entries_to_corrupt =
-            (std::deque<uint64_t>*)arg;
-        assert(!hash_entries_to_corrupt->empty());
-        *(hash_entries_to_corrupt->begin()) =
-            *(hash_entries_to_corrupt->begin()) ^ uint64_t { 1 };
-      });
-  SyncPoint::GetInstance()->EnableProcessing();
-
-  s = Flush();
-
-  SyncPoint::GetInstance()->DisableProcessing();
-  SyncPoint::GetInstance()->ClearCallBack(
-      "XXPH3FilterBitsBuilder::Finish::"
-      "TamperHashEntries");
-
-  ASSERT_FALSE(table_options.detect_filter_construct_corruption);
-  EXPECT_TRUE(s.ok());
-
-  // Case 2: dynamically turn on
-  // table_options.detect_filter_construct_corruption
-  ASSERT_OK(db_->SetOptions({{"block_based_table_factory",
-                              "{detect_filter_construct_corruption=true;}"}}));
-
-  for (int i = 0; i < num_key; i++) {
-    ASSERT_OK(Put(Key(i), Key(i)));
-  }
-
-  SyncPoint::GetInstance()->SetCallBack(
-      "XXPH3FilterBitsBuilder::Finish::TamperHashEntries", [&](void* arg) {
-        std::deque<uint64_t>* hash_entries_to_corrupt =
-            (std::deque<uint64_t>*)arg;
-        assert(!hash_entries_to_corrupt->empty());
-        *(hash_entries_to_corrupt->begin()) =
-            *(hash_entries_to_corrupt->begin()) ^ uint64_t { 1 };
-      });
-  SyncPoint::GetInstance()->EnableProcessing();
-
-  s = Flush();
-
-  SyncPoint::GetInstance()->DisableProcessing();
-  SyncPoint::GetInstance()->ClearCallBack(
-      "XXPH3FilterBitsBuilder::Finish::"
-      "TamperHashEntries");
-
-  auto updated_table_options =
-      db_->GetOptions().table_factory->GetOptions<BlockBasedTableOptions>();
-  EXPECT_TRUE(updated_table_options->detect_filter_construct_corruption);
-  EXPECT_TRUE(s.IsCorruption());
-  EXPECT_TRUE(s.ToString().find("Filter's hash entries checksum mismatched") !=
-              std::string::npos);
-
-  // Case 3: dynamically turn off
-  // table_options.detect_filter_construct_corruption
-  ASSERT_OK(db_->SetOptions({{"block_based_table_factory",
-                              "{detect_filter_construct_corruption=false;}"}}));
-  updated_table_options =
-      db_->GetOptions().table_factory->GetOptions<BlockBasedTableOptions>();
-  EXPECT_FALSE(updated_table_options->detect_filter_construct_corruption);
-}
-#endif  // ROCKSDB_LITE
-
 namespace {
 // NOTE: This class is referenced by HISTORY.md as a model for a wrapper
 // FilterPolicy selecting among configurations based on context.
@@ -2272,6 +2169,7 @@ class BloomStatsTestWithParam
      options_.table_factory.reset(NewPlainTableFactory(table_options));
    } else {
      BlockBasedTableOptions table_options;
+      table_options.hash_index_allow_collision = false;
      if (partition_filters_) {
        assert(bfp_impl_ != kDeprecatedBlock);
        table_options.partition_filters = partition_filters_;
@@ -1354,74 +1354,6 @@ TEST_P(DBCompactionTestWithParam, TrivialMoveTargetLevel) {
  }
 }

-TEST_P(DBCompactionTestWithParam, PartialOverlappingL0) {
-  class SubCompactionEventListener : public EventListener {
-   public:
-    void OnSubcompactionCompleted(const SubcompactionJobInfo&) override {
-      sub_compaction_finished_++;
-    }
-    std::atomic<int> sub_compaction_finished_{0};
-  };
-
-  Options options = CurrentOptions();
-  options.disable_auto_compactions = true;
-  options.write_buffer_size = 10 * 1024 * 1024;
-  options.max_subcompactions = max_subcompactions_;
-  SubCompactionEventListener* listener = new SubCompactionEventListener();
-  options.listeners.emplace_back(listener);
-
-  DestroyAndReopen(options);
-
-  // For subcompactino to trigger, output level needs to be non-empty.
-  ASSERT_OK(Put("key", ""));
-  ASSERT_OK(Put("kez", ""));
-  ASSERT_OK(Flush());
-  ASSERT_OK(Put("key", ""));
-  ASSERT_OK(Put("kez", ""));
-  ASSERT_OK(Flush());
-  ASSERT_OK(db_->CompactRange(CompactRangeOptions(), nullptr, nullptr));
-
-  // Ranges that are only briefly overlapping so that they won't be trivially
-  // moved but subcompaction ranges would only contain a subset of files.
-  std::vector<std::pair<int32_t, int32_t>> ranges = {
-      {100, 199}, {198, 399}, {397, 600}, {598, 800}, {799, 900}, {895, 999},
-  };
-  int32_t value_size = 10 * 1024;  // 10 KB
-
-  Random rnd(301);
-  std::map<int32_t, std::string> values;
-  for (size_t i = 0; i < ranges.size(); i++) {
-    for (int32_t j = ranges[i].first; j <= ranges[i].second; j++) {
-      values[j] = rnd.RandomString(value_size);
-      ASSERT_OK(Put(Key(j), values[j]));
-    }
-    ASSERT_OK(Flush());
-  }
-
-  int32_t level0_files = NumTableFilesAtLevel(0, 0);
-  ASSERT_EQ(level0_files, ranges.size());    // Multiple files in L0
-  ASSERT_EQ(NumTableFilesAtLevel(1, 0), 1);  // One file in L1
-
-  listener->sub_compaction_finished_ = 0;
-  ASSERT_OK(db_->EnableAutoCompaction({db_->DefaultColumnFamily()}));
-  ASSERT_OK(dbfull()->TEST_WaitForCompact());
-  if (max_subcompactions_ > 3) {
-    // RocksDB might not generate the exact number of sub compactions.
-    // Here we validate that at least subcompaction happened.
-    ASSERT_GT(listener->sub_compaction_finished_.load(), 2);
-  }
-
-  // We expect that all the files were compacted to L1
-  ASSERT_EQ(NumTableFilesAtLevel(0, 0), 0);
-  ASSERT_GT(NumTableFilesAtLevel(1, 0), 1);
-
-  for (size_t i = 0; i < ranges.size(); i++) {
-    for (int32_t j = ranges[i].first; j <= ranges[i].second; j++) {
-      ASSERT_EQ(Get(Key(j)), values[j]);
-    }
-  }
-}
-
 TEST_P(DBCompactionTestWithParam, ManualCompactionPartial) {
  int32_t trivial_move = 0;
  int32_t non_trivial_move = 0;
@@ -96,7 +96,7 @@ Status DBImpl::GetLiveFiles(std::vector<std::string>& ret,
              3);  // for CURRENT + MANIFEST + OPTIONS

  // create names of the live files. The names are not absolute
-  // paths, instead they are relative to dbname_.
+  // paths, instead they are relative to dbname_;
  for (const auto& table_file_number : live_table_files) {
    ret.emplace_back(MakeTableFileName("", table_file_number));
  }
@@ -166,7 +166,7 @@ Status DBImpl::GetCurrentWalFile(std::unique_ptr<LogFile>* current_log_file) {
 Status DBImpl::GetLiveFilesStorageInfo(
    const LiveFilesStorageInfoOptions& opts,
    std::vector<LiveFileStorageInfo>* files) {
-  // To avoid returning partial results, only move results to files on success.
+  // To avoid returning partial results, only move to ouput on success
  assert(files);
  files->clear();
  std::vector<LiveFileStorageInfo> results;
@@ -180,7 +180,7 @@ Status DBImpl::GetLiveFilesStorageInfo(
    if (opts.wal_size_for_flush == port::kMaxUint64) {
      flush_memtable = false;
    } else if (opts.wal_size_for_flush > 0) {
-      // If the outstanding log files are small, we skip the flush.
+      // If out standing log files are small, we skip the flush.
      s = GetSortedWalFiles(live_wal_files);

      if (!s.ok()) {
@@ -313,7 +313,8 @@ Status DBImpl::GetLiveFilesStorageInfo(
    info.relative_filename = kCurrentFileName;
    info.directory = GetName();
    info.file_type = kCurrentFile;
-    // CURRENT could be replaced so we have to record the contents as needed.
+    // CURRENT could be replaced so we have to record the contents we want
+    // for it
    info.replacement_contents = manifest_fname + "\n";
    info.size = manifest_fname.size() + 1;
    if (opts.include_checksum_info) {
@@ -355,7 +356,7 @@ Status DBImpl::GetLiveFilesStorageInfo(
  TEST_SYNC_POINT("CheckpointImpl::CreateCustomCheckpoint:AfterGetLive1");
  TEST_SYNC_POINT("CheckpointImpl::CreateCustomCheckpoint:AfterGetLive2");

-  // If we have more than one column family, we also need to get WAL files.
+  // if we have more than one column family, we need to also get WAL files
  if (s.ok()) {
    s = GetSortedWalFiles(live_wal_files);
  }
@@ -393,7 +394,7 @@ Status DBImpl::GetLiveFilesStorageInfo(
  }

  if (s.ok()) {
-    // Only move results to output on success.
+    // Only move output on success
    *files = std::move(results);
  }
  return s;
@@ -1374,140 +1374,6 @@ TEST_F(DBFlushTest, DISABLED_MemPurgeWALSupport) {
  } while (ChangeWalOptions());
 }

-TEST_F(DBFlushTest, MemPurgeCorrectLogNumberAndSSTFileCreation) {
-  // Before our bug fix, we noticed that when 2 memtables were
-  // being flushed (with one memtable being the output of a
-  // previous MemPurge and one memtable being a newly-sealed memtable),
-  // the SST file created was not properly added to the DB version
-  // (via the VersionEdit obj), leading to data loss (the SST file
-  // was later being purged as an obsolete file).
-  // Therefore, we reproduce this scenario to test our fix.
-  Options options = CurrentOptions();
-
-  options.create_if_missing = true;
-  options.compression = kNoCompression;
-  options.inplace_update_support = false;
-  options.allow_concurrent_memtable_write = true;
-
-  // Enforce size of a single MemTable to 1MB (64MB = 1048576 bytes).
-  options.write_buffer_size = 1 << 20;
-  // Activate the MemPurge prototype.
-  options.experimental_mempurge_threshold = 1.0;
-
-  // Force to have more than one memtable to trigger a flush.
-  // For some reason this option does not seem to be enforced,
-  // so the following test is designed to make sure that we
-  // are testing the correct test case.
-  options.min_write_buffer_number_to_merge = 3;
-  options.max_write_buffer_number = 5;
-  options.max_write_buffer_size_to_maintain = 2 * (options.write_buffer_size);
-  options.disable_auto_compactions = true;
-  ASSERT_OK(TryReopen(options));
-
-  std::atomic<uint32_t> mempurge_count{0};
-  std::atomic<uint32_t> sst_count{0};
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
-      "DBImpl::FlushJob:MemPurgeSuccessful",
-      [&](void* /*arg*/) { mempurge_count++; });
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
-      "DBImpl::FlushJob:SSTFileCreated", [&](void* /*arg*/) { sst_count++; });
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
-
-  // Dummy variable used for the following callback function.
-  uint64_t ZERO = 0;
-  // We will first execute mempurge operations exclusively.
-  // Therefore, when the first flush is triggered, we want to make
-  // sure there is at least 2 memtables being flushed: one output
-  // from a previous mempurge, and one newly sealed memtable.
-  // This is when we observed in the past that some SST files created
-  // were not properly added to the DB version (via the VersionEdit obj).
-  std::atomic<uint64_t> num_memtable_at_first_flush(0);
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
-      "FlushJob::WriteLevel0Table:num_memtables", [&](void* arg) {
-        uint64_t* mems_size = reinterpret_cast<uint64_t*>(arg);
-        // atomic_compare_exchange_strong sometimes updates the value
-        // of ZERO (the "expected" object), so we make sure ZERO is indeed...
-        // zero.
-        ZERO = 0;
-        std::atomic_compare_exchange_strong(&num_memtable_at_first_flush, &ZERO,
-                                            *mems_size);
-      });
-
-  const std::vector<std::string> KEYS = {
-      "ThisIsKey1", "ThisIsKey2", "ThisIsKey3", "ThisIsKey4", "ThisIsKey5",
-      "ThisIsKey6", "ThisIsKey7", "ThisIsKey8", "ThisIsKey9"};
-  const std::string NOT_FOUND = "NOT_FOUND";
-
-  Random rnd(117);
-  const uint64_t NUM_REPEAT_OVERWRITES = 100;
-  const uint64_t NUM_RAND_INSERTS = 500;
-  const uint64_t RAND_VALUES_LENGTH = 10240;
-
-  std::string key, value;
-  std::vector<std::string> values(9, "");
-
-  // Keys used to check that no SST file disappeared.
-  for (uint64_t k = 0; k < 5; k++) {
-    values[k] = rnd.RandomString(RAND_VALUES_LENGTH);
-    ASSERT_OK(Put(KEYS[k], values[k]));
-  }
-
-  // Insertion of of K-V pairs, multiple times.
-  // Trigger at least one mempurge and no SST file creation.
-  for (size_t i = 0; i < NUM_REPEAT_OVERWRITES; i++) {
-    // Create value strings of arbitrary length RAND_VALUES_LENGTH bytes.
-    for (uint64_t k = 5; k < values.size(); k++) {
-      values[k] = rnd.RandomString(RAND_VALUES_LENGTH);
-      ASSERT_OK(Put(KEYS[k], values[k]));
-    }
-    // Check database consistency.
-    for (uint64_t k = 0; k < values.size(); k++) {
-      ASSERT_EQ(Get(KEYS[k]), values[k]);
-    }
-  }
-
-  // Check that there was at least one mempurge
-  uint32_t expected_min_mempurge_count = 1;
-  // Check that there was no SST files created during flush.
-  uint32_t expected_sst_count = 0;
-  EXPECT_GE(mempurge_count.load(), expected_min_mempurge_count);
-  EXPECT_EQ(sst_count.load(), expected_sst_count);
-
-  // Trigger an SST file creation and no mempurge.
-  for (size_t i = 0; i < NUM_RAND_INSERTS; i++) {
-    key = rnd.RandomString(RAND_VALUES_LENGTH);
-    // Create value strings of arbitrary length RAND_VALUES_LENGTH bytes.
-    value = rnd.RandomString(RAND_VALUES_LENGTH);
-    ASSERT_OK(Put(key, value));
-    // Check database consistency.
-    for (uint64_t k = 0; k < values.size(); k++) {
-      ASSERT_EQ(Get(KEYS[k]), values[k]);
-    }
-    ASSERT_EQ(Get(key), value);
-  }
-
-  // Check that there was at least one SST files created during flush.
-  expected_sst_count = 1;
-  EXPECT_GE(sst_count.load(), expected_sst_count);
-
-  // Oddly enough, num_memtable_at_first_flush is not enforced to be
-  // equal to min_write_buffer_number_to_merge. So by asserting that
-  // the first SST file creation comes from one output memtable
-  // from a previous mempurge, and one newly sealed memtable. This
-  // is the scenario where we observed that some SST files created
-  // were not properly added to the DB version before our bug fix.
-  ASSERT_GE(num_memtable_at_first_flush.load(), 2);
-
-  // Check that no data was lost after SST file creation.
-  for (uint64_t k = 0; k < values.size(); k++) {
-    ASSERT_EQ(Get(KEYS[k]), values[k]);
-  }
-  // Extra check of database consistency.
-  ASSERT_EQ(Get(key), value);
-
-  Close();
-}
-
 TEST_P(DBFlushDirectIOTest, DirectIO) {
  Options options;
  options.create_if_missing = true;
@@ -1709,9 +1575,6 @@ TEST_F(DBFlushTest, FireOnFlushCompletedAfterCommittedResult) {
  flush_opts.wait = false;
  ASSERT_OK(db_->Flush(flush_opts));
  t1.join();
-  // Ensure background work is fully finished including listener callbacks
-  // before accessing listener state.
-  ASSERT_OK(dbfull()->TEST_WaitForBackgroundWork());
  ASSERT_TRUE(listener->completed1);
  ASSERT_TRUE(listener->completed2);
  SyncPoint::GetInstance()->DisableProcessing();
@@ -2271,7 +2134,7 @@ TEST_P(DBAtomicFlushTest, ManualFlushUnder2PC) {

  // The recovered min log number with prepared data should be non-zero.
  // In 2pc mode, MinLogNumberToKeep returns the
-  // VersionSet::min_log_number_to_keep recovered from MANIFEST, if it's 0,
+  // VersionSet::min_log_number_to_keep_2pc recovered from MANIFEST, if it's 0,
  // it means atomic flush didn't write the min_log_number_to_keep to MANIFEST.
  cfs.push_back(kDefaultColumnFamilyName);
  ASSERT_OK(TryReopenWithColumnFamilies(cfs, options));
@@ -119,16 +119,18 @@ CompressionType GetCompressionFlush(
  // Compressing memtable flushes might not help unless the sequential load
  // optimization is used for leveled compaction. Otherwise the CPU and
  // latency overhead is not offset by saving much space.
-  if (ioptions.compaction_style == kCompactionStyleUniversal &&
-      mutable_cf_options.compaction_options_universal
-              .compression_size_percent >= 0) {
-    return kNoCompression;
-  }
-  if (mutable_cf_options.compression_per_level.empty()) {
-    return mutable_cf_options.compression;
-  } else {
+  if (ioptions.compaction_style == kCompactionStyleUniversal) {
+    if (mutable_cf_options.compaction_options_universal
+            .compression_size_percent < 0) {
+      return mutable_cf_options.compression;
+    } else {
+      return kNoCompression;
+    }
+  } else if (!ioptions.compression_per_level.empty()) {
    // For leveled compress when min_level_to_compress != 0.
-    return mutable_cf_options.compression_per_level[0];
+    return ioptions.compression_per_level[0];
+  } else {
+    return mutable_cf_options.compression;
  }
 }

@@ -1081,6 +1083,7 @@ Status DBImpl::SetOptions(
  MutableCFOptions new_options;
  Status s;
  Status persist_options_status;
+  persist_options_status.PermitUncheckedError();  // Allow uninitialized access
  SuperVersionContext sv_context(/* create_superversion */ true);
  {
    auto db_options = GetDBOptions();
@@ -1116,11 +1119,9 @@ Status DBImpl::SetOptions(
                   "[%s] SetOptions() succeeded", cfd->GetName().c_str());
    new_options.Dump(immutable_db_options_.info_log.get());
    if (!persist_options_status.ok()) {
-      // NOTE: WriteOptionsFile already logs on failure
      s = persist_options_status;
    }
  } else {
-    persist_options_status.PermitUncheckedError();  // less important
    ROCKS_LOG_WARN(immutable_db_options_.info_log, "[%s] SetOptions() failed",
                   cfd->GetName().c_str());
  }
@@ -1889,8 +1890,6 @@ Status DBImpl::GetImpl(const ReadOptions& read_options, const Slice& key,
      return s;
    }
  }
-  TEST_SYNC_POINT("DBImpl::GetImpl:PostMemTableGet:0");
-  TEST_SYNC_POINT("DBImpl::GetImpl:PostMemTableGet:1");
  PinnedIteratorsManager pinned_iters_mgr;
  if (!done) {
    PERF_TIMER_GUARD(get_from_output_files_time);
@@ -1908,6 +1907,8 @@ Status DBImpl::GetImpl(const ReadOptions& read_options, const Slice& key,
  {
    PERF_TIMER_GUARD(get_post_process_time);

+    ReturnAndCleanupSuperVersion(cfd, sv);
+
    RecordTick(stats_, NUMBER_KEYS_READ);
    size_t size = 0;
    if (s.ok()) {
@@ -1934,8 +1935,6 @@ Status DBImpl::GetImpl(const ReadOptions& read_options, const Slice& key,
      PERF_COUNTER_ADD(get_read_bytes, size);
    }
    RecordInHistogram(stats_, BYTES_PER_READ, size);
-
-    ReturnAndCleanupSuperVersion(cfd, sv);
  }
  return s;
 }
@@ -663,8 +663,7 @@ class DBImpl : public DB {
                             const CompactRangeOptions& compact_range_options,
                             const Slice* begin, const Slice* end,
                             bool exclusive, bool disallow_trivial_move,
-                             uint64_t max_file_num_to_ignore,
-                             const std::string& trim_ts);
+                             uint64_t max_file_num_to_ignore);

  // Return an internal iterator over the current state of the database.
  // The keys of this iterator are internal keys (see format.h).
@@ -1248,8 +1247,7 @@ class DBImpl : public DB {

  Status CompactRangeInternal(const CompactRangeOptions& options,
                              ColumnFamilyHandle* column_family,
-                              const Slice* begin, const Slice* end,
-                              const std::string& trim_ts);
+                              const Slice* begin, const Slice* end);

  // The following two functions can only be called when:
  // 1. WriteThread::Writer::EnterUnbatched() is used.
@@ -1783,12 +1781,8 @@ class DBImpl : public DB {
                         WriteBatch* tmp_batch, size_t* write_with_wal,
                         WriteBatch** to_be_cached_state);

-  // rate_limiter_priority is used to charge `DBOptions::rate_limiter`
-  // for automatic WAL flush (`Options::manual_wal_flush` == false)
-  // associated with this WriteToWAL
  IOStatus WriteToWAL(const WriteBatch& merged_batch, log::Writer* log_writer,
                      uint64_t* log_used, uint64_t* log_size,
-                      Env::IOPriority rate_limiter_priority,
                      bool with_db_mutex = false, bool with_log_mutex = false);

  IOStatus WriteToWAL(const WriteThread::WriteGroup& write_group,
@@ -2144,7 +2138,7 @@ class DBImpl : public DB {
  // only during recovery. Using this feature enables not writing the state to
  // memtable on normal writes and hence improving the throughput. Each new
  // write of the state will replace the previous state entirely even if the
-  // keys in the two consecutive states do not overlap.
+  // keys in the two consecuitive states do not overlap.
  // It is protected by log_write_mutex_ when two_write_queues_ is enabled.
  // Otherwise only the heaad of write_thread_ can access it.
  WriteBatch cached_recoverable_state_;
@@ -263,6 +263,11 @@ Status DBImpl::FlushMemTableToOutputFile(
  if (!s.ok() && need_cancel) {
    flush_job.Cancel();
  }
+  IOStatus io_s = IOStatus::OK();
+  io_s = flush_job.io_status();
+  if (s.ok()) {
+    s = io_s;
+  }

  if (s.ok()) {
    InstallSuperVersionAndScheduleWork(cfd, superversion_context,
@@ -298,7 +303,9 @@ Status DBImpl::FlushMemTableToOutputFile(
  }

  if (!s.ok() && !s.IsShutdownInProgress() && !s.IsColumnFamilyDropped()) {
-    if (log_io_s.ok()) {
+    if (!io_s.ok() && !io_s.IsShutdownInProgress() &&
+        !io_s.IsColumnFamilyDropped()) {
+      assert(log_io_s.ok());
      // Error while writing to MANIFEST.
      // In fact, versions_->io_status() can also be the result of renaming
      // CURRENT file. With current code, it's just difficult to tell. So just
@@ -309,19 +316,24 @@ Status DBImpl::FlushMemTableToOutputFile(
        // error), all the Manifest write will be map to soft error.
        // TODO: kManifestWriteNoWAL and kFlushNoWAL are misleading. Refactor is
        // needed.
-        error_handler_.SetBGError(s,
+        error_handler_.SetBGError(io_s,
                                  BackgroundErrorReason::kManifestWriteNoWAL);
      } else {
        // If WAL sync is successful (either WAL size is 0 or there is no IO
        // error), all the other SST file write errors will be set as
        // kFlushNoWAL.
-        error_handler_.SetBGError(s, BackgroundErrorReason::kFlushNoWAL);
+        error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlushNoWAL);
      }
    } else {
-      assert(s == log_io_s);
-      Status new_bg_error = s;
-      error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
+      if (log_io_s.ok()) {
+        Status new_bg_error = s;
+        error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
+      }
    }
+  } else {
+    // If we got here, then we decided not to care about the i_os status (either
+    // from never needing it or ignoring the flush job status
+    io_s.PermitUncheckedError();
  }
  // If flush ran smoothly and no mempurge happened
  // install new SST file path.
@@ -370,14 +382,13 @@ Status DBImpl::FlushMemTablesToOutputFiles(
                     &earliest_write_conflict_snapshot, &snapshot_checker);
  const auto& bg_flush_arg = bg_flush_args[0];
  ColumnFamilyData* cfd = bg_flush_arg.cfd_;
-  // intentional infrequent copy for each flush
-  MutableCFOptions mutable_cf_options_copy = *cfd->GetLatestMutableCFOptions();
+  MutableCFOptions mutable_cf_options = *cfd->GetLatestMutableCFOptions();
  SuperVersionContext* superversion_context =
      bg_flush_arg.superversion_context_;
  Status s = FlushMemTableToOutputFile(
-      cfd, mutable_cf_options_copy, made_progress, job_context,
-      superversion_context, snapshot_seqs, earliest_write_conflict_snapshot,
-      snapshot_checker, log_buffer, thread_pri);
+      cfd, mutable_cf_options, made_progress, job_context, superversion_context,
+      snapshot_seqs, earliest_write_conflict_snapshot, snapshot_checker,
+      log_buffer, thread_pri);
  return s;
 }

@@ -404,7 +415,6 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
  for (const auto cfd : cfds) {
    assert(cfd->imm()->NumNotFlushed() != 0);
    assert(cfd->imm()->IsFlushPending());
-    assert(cfd->GetFlushReason() == cfds[0]->GetFlushReason());
  }
 #endif /* !NDEBUG */

@@ -491,10 +501,12 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
  // exec_status stores the execution status of flush_jobs as
  // <bool /* executed */, Status /* status code */>
  autovector<std::pair<bool, Status>> exec_status;
+  autovector<IOStatus> io_status;
  std::vector<bool> pick_status;
  for (int i = 0; i != num_cfs; ++i) {
    // Initially all jobs are not executed, with status OK.
    exec_status.emplace_back(false, Status::OK());
+    io_status.emplace_back(IOStatus::OK());
    pick_status.push_back(false);
  }

@@ -514,6 +526,7 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
          jobs[i]->Run(&logs_with_prep_tracker_, &file_meta[i],
                       &(switched_to_mempurge.at(i)));
      exec_status[i].first = true;
+      io_status[i] = jobs[i]->io_status();
    }
    if (num_cfs > 1) {
      TEST_SYNC_POINT(
@@ -527,6 +540,7 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
        &logs_with_prep_tracker_, file_meta.data() /* &file_meta[0] */,
        switched_to_mempurge.empty() ? nullptr : &(switched_to_mempurge.at(0)));
    exec_status[0].first = true;
+    io_status[0] = jobs[0]->io_status();

    Status error_status;
    for (const auto& e : exec_status) {
@@ -545,6 +559,21 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
    s = error_status.ok() ? s : error_status;
  }

+  IOStatus io_s = IOStatus::OK();
+  if (io_s.ok()) {
+    IOStatus io_error = IOStatus::OK();
+    for (int i = 0; i != static_cast<int>(io_status.size()); i++) {
+      if (!io_status[i].ok() && !io_status[i].IsShutdownInProgress() &&
+          !io_status[i].IsColumnFamilyDropped()) {
+        io_error = io_status[i];
+      }
+    }
+    io_s = io_error;
+    if (s.ok() && !io_s.ok()) {
+      s = io_s;
+    }
+  }
+
  if (s.IsColumnFamilyDropped()) {
    s = Status::OK();
  }
@@ -617,10 +646,7 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
      return std::make_pair(Status::OK(), !ready);
    };

-    bool resuming_from_bg_err =
-        error_handler_.IsDBStopped() ||
-        (cfds[0]->GetFlushReason() == FlushReason::kErrorRecovery ||
-         cfds[0]->GetFlushReason() == FlushReason::kErrorRecoveryRetryFlush);
+    bool resuming_from_bg_err = error_handler_.IsDBStopped();
    while ((!resuming_from_bg_err || error_handler_.GetRecoveryError().ok())) {
      std::pair<Status, bool> res = wait_to_install_func();

@@ -635,10 +661,7 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
      }
      atomic_flush_install_cv_.Wait();

-      resuming_from_bg_err =
-          error_handler_.IsDBStopped() ||
-          (cfds[0]->GetFlushReason() == FlushReason::kErrorRecovery ||
-           cfds[0]->GetFlushReason() == FlushReason::kErrorRecoveryRetryFlush);
+      resuming_from_bg_err = error_handler_.IsDBStopped();
    }

    if (!resuming_from_bg_err) {
@@ -762,7 +785,8 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
  // Need to undo atomic flush if something went wrong, i.e. s is not OK and
  // it is not because of CF drop.
  if (!s.ok() && !s.IsColumnFamilyDropped()) {
-    if (log_io_s.ok()) {
+    if (!io_s.ok() && !io_s.IsColumnFamilyDropped()) {
+      assert(log_io_s.ok());
      // Error while writing to MANIFEST.
      // In fact, versions_->io_status() can also be the result of renaming
      // CURRENT file. With current code, it's just difficult to tell. So just
@@ -773,18 +797,19 @@ Status DBImpl::AtomicFlushMemTablesToOutputFiles(
        // error), all the Manifest write will be map to soft error.
        // TODO: kManifestWriteNoWAL and kFlushNoWAL are misleading. Refactor
        // is needed.
-        error_handler_.SetBGError(s,
+        error_handler_.SetBGError(io_s,
                                  BackgroundErrorReason::kManifestWriteNoWAL);
      } else {
        // If WAL sync is successful (either WAL size is 0 or there is no IO
        // error), all the other SST file write errors will be set as
        // kFlushNoWAL.
-        error_handler_.SetBGError(s, BackgroundErrorReason::kFlushNoWAL);
+        error_handler_.SetBGError(io_s, BackgroundErrorReason::kFlushNoWAL);
      }
    } else {
-      assert(s == log_io_s);
-      Status new_bg_error = s;
-      error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
+      if (log_io_s.ok()) {
+        Status new_bg_error = s;
+        error_handler_.SetBGError(new_bg_error, BackgroundErrorReason::kFlush);
+      }
    }
  }

@@ -901,7 +926,7 @@ Status DBImpl::CompactRange(const CompactRangeOptions& options,
  size_t ts_sz = ucmp->timestamp_size();
  if (ts_sz == 0) {
    return CompactRangeInternal(options, column_family, begin_without_ts,
-                                end_without_ts, "" /*trim_ts*/);
+                                end_without_ts);
  }

  std::string begin_str;
@@ -923,7 +948,7 @@ Status DBImpl::CompactRange(const CompactRangeOptions& options,
  Slice* end_with_ts = end_without_ts ? &end : nullptr;

  return CompactRangeInternal(options, column_family, begin_with_ts,
-                              end_with_ts, "" /*trim_ts*/);
+                              end_with_ts);
 }

 Status DBImpl::IncreaseFullHistoryTsLow(ColumnFamilyHandle* column_family,
@@ -969,8 +994,7 @@ Status DBImpl::IncreaseFullHistoryTsLowImpl(ColumnFamilyData* cfd,

 Status DBImpl::CompactRangeInternal(const CompactRangeOptions& options,
                                    ColumnFamilyHandle* column_family,
-                                    const Slice* begin, const Slice* end,
-                                    const std::string& trim_ts) {
+                                    const Slice* begin, const Slice* end) {
  auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
  auto cfd = cfh->cfd();

@@ -1041,7 +1065,7 @@ Status DBImpl::CompactRangeInternal(const CompactRangeOptions& options,
    }
    s = RunManualCompaction(cfd, ColumnFamilyData::kCompactAllLevels,
                            final_output_level, options, begin, end, exclusive,
-                            false, port::kMaxUint64, trim_ts);
+                            false, port::kMaxUint64);
  } else {
    int first_overlapped_level = kInvalidLevel;
    int max_overlapped_level = kInvalidLevel;
@@ -1127,13 +1151,9 @@ Status DBImpl::CompactRangeInternal(const CompactRangeOptions& options,
            disallow_trivial_move = true;
          }
        }
-        // trim_ts need real compaction to remove latest record
-        if (!trim_ts.empty()) {
-          disallow_trivial_move = true;
-        }
        s = RunManualCompaction(cfd, level, output_level, options, begin, end,
                                exclusive, disallow_trivial_move,
-                                max_file_num_to_ignore, trim_ts);
+                                max_file_num_to_ignore);
        if (!s.ok()) {
          break;
        }
@@ -1372,8 +1392,7 @@ Status DBImpl::CompactFilesImpl(
      c->mutable_cf_options()->report_bg_io_stats, dbname_,
      &compaction_job_stats, Env::Priority::USER, io_tracer_,
      &manual_compaction_paused_, nullptr, db_id_, db_session_id_,
-      c->column_family_data()->GetFullHistoryTsLow(), c->trim_ts(),
-      &blob_callback_);
+      c->column_family_data()->GetFullHistoryTsLow(), &blob_callback_);

  // Creating a compaction influences the compaction score because the score
  // takes running compactions into account (by skipping files that are already
@@ -1762,7 +1781,7 @@ Status DBImpl::RunManualCompaction(
    ColumnFamilyData* cfd, int input_level, int output_level,
    const CompactRangeOptions& compact_range_options, const Slice* begin,
    const Slice* end, bool exclusive, bool disallow_trivial_move,
-    uint64_t max_file_num_to_ignore, const std::string& trim_ts) {
+    uint64_t max_file_num_to_ignore) {
  assert(input_level == ColumnFamilyData::kCompactAllLevels ||
         input_level >= 0);

@@ -1874,7 +1893,7 @@ Status DBImpl::RunManualCompaction(
               *manual.cfd->GetLatestMutableCFOptions(), mutable_db_options_,
               manual.input_level, manual.output_level, compact_range_options,
               manual.begin, manual.end, &manual.manual_end, &manual_conflict,
-               max_file_num_to_ignore, trim_ts)) == nullptr &&
+               max_file_num_to_ignore)) == nullptr &&
          manual_conflict))) {
      // exclusive manual compactions should not see a conflict during
      // CompactRange
@@ -3369,7 +3388,7 @@ Status DBImpl::BackgroundCompaction(bool* made_progress,
        is_manual ? &manual_compaction_paused_ : nullptr,
        is_manual ? manual_compaction->canceled : nullptr, db_id_,
        db_session_id_, c->column_family_data()->GetFullHistoryTsLow(),
-        c->trim_ts(), &blob_callback_);
+        &blob_callback_);
    compaction_job.Prepare();

    NotifyOnCompactionBegin(c->column_family_data(), c.get(), status,
@@ -120,8 +120,7 @@ Status DBImpl::TEST_CompactRange(int level, const Slice* begin,
          : level + 1;
  return RunManualCompaction(cfd, level, output_level, CompactRangeOptions(),
                             begin, end, true, disallow_trivial_move,
-                             port::kMaxUint64 /*max_file_num_to_ignore*/,
-                             "" /*trim_ts*/);
+                             port::kMaxUint64 /*max_file_num_to_ignore*/);
 }

 Status DBImpl::TEST_SwitchMemtable(ColumnFamilyData* cfd) {
@@ -1566,72 +1566,6 @@ Status DB::Open(const DBOptions& db_options, const std::string& dbname,
                      !kSeqPerBatch, kBatchPerTxn);
 }

-// TODO: Implement the trimming in flush code path.
-// TODO: Perform trimming before inserting into memtable during recovery.
-// TODO: Pick files with max_timestamp > trim_ts by each file's timestamp meta
-// info, and handle only these files to reduce io.
-Status DB::OpenAndTrimHistory(
-    const DBOptions& db_options, const std::string& dbname,
-    const std::vector<ColumnFamilyDescriptor>& column_families,
-    std::vector<ColumnFamilyHandle*>* handles, DB** dbptr,
-    std::string trim_ts) {
-  assert(dbptr != nullptr);
-  assert(handles != nullptr);
-  auto validate_options = [&db_options] {
-    if (db_options.avoid_flush_during_recovery) {
-      return Status::InvalidArgument(
-          "avoid_flush_during_recovery incompatible with "
-          "OpenAndTrimHistory");
-    }
-    return Status::OK();
-  };
-  auto s = validate_options();
-  if (!s.ok()) {
-    return s;
-  }
-
-  DB* db = nullptr;
-  s = DB::Open(db_options, dbname, column_families, handles, &db);
-  if (!s.ok()) {
-    return s;
-  }
-  assert(db);
-  CompactRangeOptions options;
-  options.bottommost_level_compaction =
-      BottommostLevelCompaction::kForceOptimized;
-  auto db_impl = static_cast_with_check<DBImpl>(db);
-  for (auto handle : *handles) {
-    assert(handle != nullptr);
-    auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(handle);
-    auto cfd = cfh->cfd();
-    assert(cfd != nullptr);
-    // Only compact column families with timestamp enabled
-    if (cfd->user_comparator() != nullptr &&
-        cfd->user_comparator()->timestamp_size() > 0) {
-      s = db_impl->CompactRangeInternal(options, handle, nullptr, nullptr,
-                                        trim_ts);
-      if (!s.ok()) {
-        break;
-      }
-    }
-  }
-  auto clean_op = [&handles, &db] {
-    for (auto handle : *handles) {
-      auto temp_s = db->DestroyColumnFamilyHandle(handle);
-      assert(temp_s.ok());
-    }
-    handles->clear();
-    delete db;
-  };
-  if (!s.ok()) {
-    clean_op();
-    return s;
-  }
-
-  *dbptr = db;
-  return s;
-}
-
 IOStatus DBImpl::CreateWAL(uint64_t log_file_num, uint64_t recycle_log_number,
                           size_t preallocate_block_size,
                           log::Writer** new_log) {
@@ -1817,7 +1751,7 @@ Status DBImpl::Open(const DBOptions& db_options, const std::string& dbname,
        uint64_t log_used, log_size;
        log::Writer* log_writer = impl->logs_.back().writer;
        s = impl->WriteToWAL(empty_batch, log_writer, &log_used, &log_size,
-                             Env::IO_TOTAL, /*with_db_mutex==*/true);
+                             /*with_db_mutex==*/true);
        if (s.ok()) {
          // Need to fsync, otherwise it might get lost after a power reset.
          s = impl->FlushWAL(false);
@@ -1971,10 +1905,10 @@ Status DBImpl::Open(const DBOptions& db_options, const std::string& dbname,
          "DB::Open() failed --- Unable to persist Options file",
          persist_options_status.ToString());
    }
-  }
-  if (!s.ok()) {
+  } else {
    ROCKS_LOG_WARN(impl->immutable_db_options_.info_log,
-                   "DB::Open() failed: %s", s.ToString().c_str());
+                   "Persisting Option File error: %s",
+                   persist_options_status.ToString().c_str());
  }
  if (s.ok()) {
    s = impl->StartPeriodicWorkScheduler();
@@ -129,32 +129,9 @@ Status DBImpl::WriteImpl(const WriteOptions& write_options,
                         PreReleaseCallback* pre_release_callback) {
  assert(!seq_per_batch_ || batch_cnt != 0);
  if (my_batch == nullptr) {
-    return Status::InvalidArgument("Batch is nullptr!");
-  } else if (!disable_memtable &&
-             WriteBatchInternal::TimestampsUpdateNeeded(*my_batch)) {
-    // If writing to memtable, then we require the caller to set/update the
-    // timestamps for the keys in the write batch.
-    // Otherwise, it means we are just writing to the WAL, and we allow
-    // timestamps unset for the keys in the write batch. This can happen if we
-    // use TransactionDB with write-committed policy, and we currently do not
-    // support user-defined timestamp with other policies.
-    // In the prepare phase, a transaction can write the batch to the WAL
-    // without inserting to memtable. The keys in the batch do not have to be
-    // assigned timestamps because they will be used only during recovery if
-    // there is a commit marker which includes their commit timestamp.
+    return Status::Corruption("Batch is nullptr!");
+  } else if (WriteBatchInternal::TimestampsUpdateNeeded(*my_batch)) {
    return Status::InvalidArgument("write batch must have timestamp(s) set");
-  } else if (write_options.rate_limiter_priority != Env::IO_TOTAL &&
-             write_options.rate_limiter_priority != Env::IO_USER) {
-    return Status::InvalidArgument(
-        "WriteOptions::rate_limiter_priority only allows "
-        "Env::IO_TOTAL and Env::IO_USER due to implementation constraints");
-  } else if (write_options.rate_limiter_priority != Env::IO_TOTAL &&
-             (write_options.disableWAL || manual_wal_flush_)) {
-    return Status::InvalidArgument(
-        "WriteOptions::rate_limiter_priority currently only supports "
-        "rate-limiting automatic WAL flush, which requires "
-        "`WriteOptions::disableWAL` and "
-        "`DBOptions::manual_wal_flush` both set to false");
  }
  // TODO: this use of operator bool on `tracer_` can avoid unnecessary lock
  // grabs but does not seem thread-safe.
@@ -1171,7 +1148,6 @@ WriteBatch* DBImpl::MergeBatch(const WriteThread::WriteGroup& write_group,
 IOStatus DBImpl::WriteToWAL(const WriteBatch& merged_batch,
                            log::Writer* log_writer, uint64_t* log_used,
                            uint64_t* log_size,
-                            Env::IOPriority rate_limiter_priority,
                            bool with_db_mutex, bool with_log_mutex) {
  assert(log_size != nullptr);

@@ -1196,7 +1172,7 @@ IOStatus DBImpl::WriteToWAL(const WriteBatch& merged_batch,
  if (UNLIKELY(needs_locking)) {
    log_write_mutex_.Lock();
  }
-  IOStatus io_s = log_writer->AddRecord(log_entry, rate_limiter_priority);
+  IOStatus io_s = log_writer->AddRecord(log_entry);

  if (UNLIKELY(needs_locking)) {
    log_write_mutex_.Unlock();
@@ -1238,8 +1214,7 @@ IOStatus DBImpl::WriteToWAL(const WriteThread::WriteGroup& write_group,
  WriteBatchInternal::SetSequence(merged_batch, sequence);

  uint64_t log_size;
-  io_s = WriteToWAL(*merged_batch, log_writer, log_used, &log_size,
-                    write_group.leader->rate_limiter_priority);
+  io_s = WriteToWAL(*merged_batch, log_writer, log_used, &log_size);
  if (to_be_cached_state) {
    cached_recoverable_state_ = *to_be_cached_state;
    cached_recoverable_state_empty_ = false;
@@ -1335,7 +1310,6 @@ IOStatus DBImpl::ConcurrentWriteToWAL(
  log::Writer* log_writer = logs_.back().writer;
  uint64_t log_size;
  io_s = WriteToWAL(*merged_batch, log_writer, log_used, &log_size,
-                    write_group.leader->rate_limiter_priority,
                    /*with_db_mutex=*/false, /*with_log_mutex=*/true);
  if (to_be_cached_state) {
    cached_recoverable_state_ = *to_be_cached_state;
@@ -1882,11 +1856,9 @@ void DBImpl::NotifyOnMemTableSealed(ColumnFamilyData* /*cfd*/,
    return;
  }

-  mutex_.Unlock();
  for (auto listener : immutable_db_options_.listeners) {
    listener->OnMemTableSealed(mem_table_info);
  }
-  mutex_.Lock();
 }
 #endif  // ROCKSDB_LITE

@@ -2087,9 +2059,11 @@ Status DBImpl::SwitchMemtable(ColumnFamilyData* cfd, WriteContext* context) {
                                     mutable_cf_options);

 #ifndef ROCKSDB_LITE
+  mutex_.Unlock();
  // Notify client that memtable is sealed, now that we have successfully
  // installed a new memtable
  NotifyOnMemTableSealed(cfd, memtable_info);
+  mutex_.Lock();
 #endif  // ROCKSDB_LITE
  // It is possible that we got here without checking the value of i_os, but
  // that is okay.  If we did, it most likely means that s was already an error.
@@ -167,14 +167,9 @@ TEST_F(DBLogicalBlockSizeCacheTest, CreateColumnFamily) {
 }

 TEST_F(DBLogicalBlockSizeCacheTest, CreateColumnFamilies) {
-  // To test:
-  // (1) CreateColumnFamilies will cache the cf_paths in
-  // DBLogicalBlockSizeCache
-  // (2) Dropping column family handles associated with
-  // that cf_paths won't drop the cached cf_paths
-  // (3) Deleting all the column family handles associated
-  //  with that cf_paths will drop the cached cf_paths
-
+  // Tests that CreateColumnFamilies will cache the cf_paths,
+  // drop the column family handle won't drop the cache,
+  // drop and then delete the column family handle will drop the cache.
  Options options;
  options.create_if_missing = true;
  options.env = env_.get();
@@ -195,7 +190,7 @@ TEST_F(DBLogicalBlockSizeCacheTest, CreateColumnFamilies) {
  ASSERT_TRUE(cache_->Contains(cf_path_0_));
  ASSERT_EQ(2, cache_->GetRefCount(cf_path_0_));

-  // Drop column family does not drop cf_path_0_'s entry from cache
+  // Drop column family does not drop cache.
  for (ColumnFamilyHandle* cf : cfs) {
    ASSERT_OK(db->DropColumnFamily(cf));
    ASSERT_EQ(2, cache_->Size());
@@ -205,24 +200,22 @@ TEST_F(DBLogicalBlockSizeCacheTest, CreateColumnFamilies) {
    ASSERT_EQ(2, cache_->GetRefCount(cf_path_0_));
  }

-  // Delete one cf handle will not drop cf_path_0_'s entry from cache because
-  // another handle is still referencing cf_path_0_.
+  // Delete one handle will not drop cache because another handle is still
+  // referencing cf_path_0_.
  ASSERT_OK(db->DestroyColumnFamilyHandle(cfs[0]));
  ASSERT_EQ(2, cache_->Size());
  ASSERT_TRUE(cache_->Contains(dbname_));
  ASSERT_EQ(1, cache_->GetRefCount(dbname_));
  ASSERT_TRUE(cache_->Contains(cf_path_0_));
+  ASSERT_EQ(1, cache_->GetRefCount(cf_path_0_));

-  // Delete all cf handles and ensure the ref count of cf_path_0_ in cache_
-  // can be properly decreased by releasing any background reference to the
-  // ColumnFamilyData during db deletion
+  // Delete the last handle will drop cache.
  ASSERT_OK(db->DestroyColumnFamilyHandle(cfs[1]));
+  ASSERT_EQ(1, cache_->Size());
  ASSERT_TRUE(cache_->Contains(dbname_));
  ASSERT_EQ(1, cache_->GetRefCount(dbname_));
-  delete db;

-  // Now cf_path_0_ in cache_ has been properly decreased and cf_path_0_'s entry
-  // is dropped from cache
+  delete db;
  ASSERT_EQ(0, cache_->Size());
  ASSERT_OK(DestroyDB(dbname_, options,
      {{"cf1", cf_options}, {"cf2", cf_options}}));
@@ -47,7 +47,7 @@ class DBMergeOperandTest : public DBTestBase {
      : DBTestBase("db_merge_operand_test", /*env_do_fsync=*/true) {}
 };

-TEST_F(DBMergeOperandTest, CacheEvictedMergeOperandReadAfterFreeBug) {
+TEST_F(DBMergeOperandTest, MergeOperandReadAfterFreeBug) {
  // There was a bug of reading merge operands after they are mistakely freed
  // in DB::GetMergeOperands, which is surfaced by cache full.
  // See PR#9507 for more.
@@ -86,42 +86,6 @@ TEST_F(DBMergeOperandTest, CacheEvictedMergeOperandReadAfterFreeBug) {
  ASSERT_EQ(values[3].ToString(), "v4");
 }

-TEST_F(DBMergeOperandTest, FlushedMergeOperandReadAfterFreeBug) {
-  // Repro for a bug where a memtable containing a merge operand could be
-  // deleted before the merge operand was saved to the result.
-  auto options = CurrentOptions();
-  options.merge_operator = MergeOperators::CreateStringAppendOperator();
-  Reopen(options);
-
-  ASSERT_OK(Merge("key", "value"));
-
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
-      {{"DBImpl::GetImpl:PostMemTableGet:0",
-        "DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PreFlush"},
-       {"DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PostFlush",
-        "DBImpl::GetImpl:PostMemTableGet:1"}});
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
-
-  auto flush_thread = port::Thread([&]() {
-    TEST_SYNC_POINT(
-        "DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PreFlush");
-    ASSERT_OK(Flush());
-    TEST_SYNC_POINT(
-        "DBMergeOperandTest::FlushedMergeOperandReadAfterFreeBug:PostFlush");
-  });
-
-  PinnableSlice value;
-  GetMergeOperandsOptions merge_operands_info;
-  merge_operands_info.expected_max_number_of_operands = 1;
-  int number_of_operands;
-  ASSERT_OK(db_->GetMergeOperands(ReadOptions(), db_->DefaultColumnFamily(),
-                                  "key", &value, &merge_operands_info,
-                                  &number_of_operands));
-  ASSERT_EQ(1, number_of_operands);
-
-  flush_thread.join();
-}
-
 TEST_F(DBMergeOperandTest, GetMergeOperandsBasic) {
  Options options;
  options.create_if_missing = true;
@@ -13,17 +13,12 @@
 #include <string>

 #include "db/db_test_util.h"
-#include "options/cf_options.h"
 #include "port/stack_trace.h"
 #include "rocksdb/listener.h"
 #include "rocksdb/options.h"
 #include "rocksdb/perf_context.h"
 #include "rocksdb/perf_level.h"
 #include "rocksdb/table.h"
-#include "table/block_based/block.h"
-#include "table/format.h"
-#include "table/meta_blocks.h"
-#include "table/table_builder.h"
 #include "test_util/mock_time_env.h"
 #include "util/random.h"
 #include "util/string_util.h"
@@ -1072,17 +1067,11 @@ TEST_F(DBPropertiesTest, EstimateCompressionRatio) {
  const int kNumEntriesPerFile = 1000;

  Options options = CurrentOptions();
+  options.compression_per_level = {kNoCompression, kSnappyCompression};
  options.disable_auto_compactions = true;
-  options.num_levels = 3;
+  options.num_levels = 2;
  Reopen(options);

-  ASSERT_OK(db_->SetOptions(
-      {{"compression_per_level", "kNoCompression:kSnappyCompression"}}));
-  auto opts = db_->GetOptions();
-  ASSERT_EQ(opts.compression_per_level.size(), 2);
-  ASSERT_EQ(opts.compression_per_level[0], kNoCompression);
-  ASSERT_EQ(opts.compression_per_level[1], kSnappyCompression);
-
  // compression ratio is -1.0 when no open files at level
  ASSERT_EQ(CompressionRatioAtLevel(0), -1.0);

@@ -1997,90 +1986,6 @@ TEST_F(DBPropertiesTest, GetMapPropertyDbStats) {
  Close();
 }

-namespace {
-std::string PopMetaIndexKey(InternalIterator* meta_iter) {
-  Status s = meta_iter->status();
-  if (!s.ok()) {
-    return s.ToString();
-  } else if (meta_iter->Valid()) {
-    std::string rv = meta_iter->key().ToString();
-    meta_iter->Next();
-    return rv;
-  } else {
-    return "NOT_FOUND";
-  }
-}
-
-}  // namespace
-
-TEST_F(DBPropertiesTest, TableMetaIndexKeys) {
-  // This is to detect unexpected churn in metaindex block keys. This is more
-  // of a "table test" but table_test.cc doesn't depend on db_test_util.h and
-  // we need ChangeOptions() for broad coverage.
-  constexpr int kKeyCount = 100;
-  do {
-    Options options;
-    options = CurrentOptions(options);
-    DestroyAndReopen(options);
-
-    // Create an SST file
-    for (int key = 0; key < kKeyCount; key++) {
-      ASSERT_OK(Put(Key(key), "val"));
-    }
-    ASSERT_OK(Flush());
-
-    // Find its file number
-    std::vector<LiveFileMetaData> files;
-    db_->GetLiveFilesMetaData(&files);
-    // 1 SST file
-    ASSERT_EQ(1, files.size());
-
-    // Open it for inspection
-    std::string sst_file =
-        files[0].directory + "/" + files[0].relative_filename;
-    std::unique_ptr<FSRandomAccessFile> f;
-    ASSERT_OK(env_->GetFileSystem()->NewRandomAccessFile(
-        sst_file, FileOptions(), &f, nullptr));
-    std::unique_ptr<RandomAccessFileReader> r;
-    r.reset(new RandomAccessFileReader(std::move(f), sst_file));
-    uint64_t file_size = 0;
-    ASSERT_OK(env_->GetFileSize(sst_file, &file_size));
-
-    // Read metaindex
-    BlockContents bc;
-    ASSERT_OK(ReadMetaIndexBlockInFile(r.get(), file_size, 0U,
-                                       ImmutableOptions(options), &bc));
-    Block metaindex_block(std::move(bc));
-    std::unique_ptr<InternalIterator> meta_iter;
-    meta_iter.reset(metaindex_block.NewMetaIterator());
-    meta_iter->SeekToFirst();
-
-    if (strcmp(options.table_factory->Name(),
-               TableFactory::kBlockBasedTableName()) == 0) {
-      auto bbto = options.table_factory->GetOptions<BlockBasedTableOptions>();
-      if (bbto->filter_policy) {
-        if (bbto->partition_filters) {
-          // The key names are intentionally hard-coded here to detect
-          // accidental regression on compatibility.
-          EXPECT_EQ("partitionedfilter.rocksdb.BuiltinBloomFilter",
-                    PopMetaIndexKey(meta_iter.get()));
-        } else {
-          EXPECT_EQ("fullfilter.rocksdb.BuiltinBloomFilter",
-                    PopMetaIndexKey(meta_iter.get()));
-        }
-      }
-      if (bbto->index_type == BlockBasedTableOptions::kHashSearch) {
-        EXPECT_EQ("rocksdb.hashindex.metadata",
-                  PopMetaIndexKey(meta_iter.get()));
-        EXPECT_EQ("rocksdb.hashindex.prefixes",
-                  PopMetaIndexKey(meta_iter.get()));
-      }
-    }
-    EXPECT_EQ("rocksdb.properties", PopMetaIndexKey(meta_iter.get()));
-    EXPECT_EQ("NOT_FOUND", PopMetaIndexKey(meta_iter.get()));
-  } while (ChangeOptions());
-}
-
 #endif  // ROCKSDB_LITE

 }  // namespace ROCKSDB_NAMESPACE
@@ -500,7 +500,7 @@ TEST_F(DBRangeDelTest, ValidUniversalSubcompactionBoundaries) {
      1 /* input_level */, 2 /* output_level */, CompactRangeOptions(),
      nullptr /* begin */, nullptr /* end */, true /* exclusive */,
      true /* disallow_trivial_move */,
-      port::kMaxUint64 /* max_file_num_to_ignore */, "" /*trim_ts*/));
+      port::kMaxUint64 /* max_file_num_to_ignore */));
 }
 #endif  // ROCKSDB_LITE

@@ -3,26 +3,18 @@
 //  COPYING file in the root directory) and Apache 2.0 License
 //  (found in the LICENSE.Apache file in the root directory).

-#include <gtest/gtest.h>
-
-#include <cstdint>
-#include <string>
-
 #include "db/db_test_util.h"
 #include "port/stack_trace.h"
-#include "rocksdb/db.h"
-#include "rocksdb/env.h"
-#include "test_util/testharness.h"
 #include "util/file_checksum_helper.h"

 namespace ROCKSDB_NAMESPACE {

-class DBRateLimiterOnReadTest
+class DBRateLimiterTest
    : public DBTestBase,
      public ::testing::WithParamInterface<std::tuple<bool, bool, bool>> {
 public:
-  explicit DBRateLimiterOnReadTest()
-      : DBTestBase("db_rate_limiter_on_read_test", /*env_do_fsync=*/false),
+  DBRateLimiterTest()
+      : DBTestBase("db_rate_limiter_test", /*env_do_fsync=*/false),
        use_direct_io_(std::get<0>(GetParam())),
        use_block_cache_(std::get<1>(GetParam())),
        use_readahead_(std::get<2>(GetParam())) {}
@@ -97,20 +89,20 @@ std::string GetTestNameSuffix(
 }

 #ifndef ROCKSDB_LITE
-INSTANTIATE_TEST_CASE_P(DBRateLimiterOnReadTest, DBRateLimiterOnReadTest,
+INSTANTIATE_TEST_CASE_P(DBRateLimiterTest, DBRateLimiterTest,
                        ::testing::Combine(::testing::Bool(), ::testing::Bool(),
                                           ::testing::Bool()),
                        GetTestNameSuffix);
 #else   // ROCKSDB_LITE
 // Cannot use direct I/O in lite mode.
-INSTANTIATE_TEST_CASE_P(DBRateLimiterOnReadTest, DBRateLimiterOnReadTest,
+INSTANTIATE_TEST_CASE_P(DBRateLimiterTest, DBRateLimiterTest,
                        ::testing::Combine(::testing::Values(false),
                                           ::testing::Bool(),
                                           ::testing::Bool()),
                        GetTestNameSuffix);
 #endif  // ROCKSDB_LITE

-TEST_P(DBRateLimiterOnReadTest, Get) {
+TEST_P(DBRateLimiterTest, Get) {
  if (use_direct_io_ && !IsDirectIOSupported()) {
    return;
  }
@@ -138,7 +130,7 @@ TEST_P(DBRateLimiterOnReadTest, Get) {
  }
 }

-TEST_P(DBRateLimiterOnReadTest, NewMultiGet) {
+TEST_P(DBRateLimiterTest, NewMultiGet) {
  // The new void-returning `MultiGet()` APIs use `MultiRead()`, which does not
  // yet support rate limiting.
  if (use_direct_io_ && !IsDirectIOSupported()) {
@@ -169,7 +161,7 @@ TEST_P(DBRateLimiterOnReadTest, NewMultiGet) {
  ASSERT_EQ(0, options_.rate_limiter->GetTotalRequests(Env::IO_USER));
 }

-TEST_P(DBRateLimiterOnReadTest, OldMultiGet) {
+TEST_P(DBRateLimiterTest, OldMultiGet) {
  // The old `vector<Status>`-returning `MultiGet()` APIs use `Read()`, which
  // supports rate limiting.
  if (use_direct_io_ && !IsDirectIOSupported()) {
@@ -201,7 +193,7 @@ TEST_P(DBRateLimiterOnReadTest, OldMultiGet) {
  ASSERT_EQ(expected, options_.rate_limiter->GetTotalRequests(Env::IO_USER));
 }

-TEST_P(DBRateLimiterOnReadTest, Iterator) {
+TEST_P(DBRateLimiterTest, Iterator) {
  if (use_direct_io_ && !IsDirectIOSupported()) {
    return;
  }
@@ -231,7 +223,7 @@ TEST_P(DBRateLimiterOnReadTest, Iterator) {

 #if !defined(ROCKSDB_LITE)

-TEST_P(DBRateLimiterOnReadTest, VerifyChecksum) {
+TEST_P(DBRateLimiterTest, VerifyChecksum) {
  if (use_direct_io_ && !IsDirectIOSupported()) {
    return;
  }
@@ -245,7 +237,7 @@ TEST_P(DBRateLimiterOnReadTest, VerifyChecksum) {
  ASSERT_EQ(expected, options_.rate_limiter->GetTotalRequests(Env::IO_USER));
 }

-TEST_P(DBRateLimiterOnReadTest, VerifyFileChecksums) {
+TEST_P(DBRateLimiterTest, VerifyFileChecksums) {
  if (use_direct_io_ && !IsDirectIOSupported()) {
    return;
  }
@@ -261,182 +253,6 @@ TEST_P(DBRateLimiterOnReadTest, VerifyFileChecksums) {

 #endif  // !defined(ROCKSDB_LITE)

-class DBRateLimiterOnWriteTest : public DBTestBase {
- public:
-  explicit DBRateLimiterOnWriteTest()
-      : DBTestBase("db_rate_limiter_on_write_test", /*env_do_fsync=*/false) {}
-
-  void Init() {
-    options_ = GetOptions();
-    ASSERT_OK(TryReopenWithColumnFamilies({"default"}, options_));
-    Random rnd(301);
-    for (int i = 0; i < kNumFiles; i++) {
-      ASSERT_OK(Put(0, kStartKey, rnd.RandomString(2)));
-      ASSERT_OK(Put(0, kEndKey, rnd.RandomString(2)));
-      ASSERT_OK(Flush(0));
-    }
-  }
-
-  Options GetOptions() {
-    Options options = CurrentOptions();
-    options.disable_auto_compactions = true;
-    options.rate_limiter.reset(NewGenericRateLimiter(
-        1 << 20 /* rate_bytes_per_sec */, 100 * 1000 /* refill_period_us */,
-        10 /* fairness */, RateLimiter::Mode::kWritesOnly));
-    options.table_factory.reset(
-        NewBlockBasedTableFactory(BlockBasedTableOptions()));
-    return options;
-  }
-
- protected:
-  inline const static int64_t kNumFiles = 3;
-  inline const static std::string kStartKey = "a";
-  inline const static std::string kEndKey = "b";
-  Options options_;
-};
-
-TEST_F(DBRateLimiterOnWriteTest, Flush) {
-  std::int64_t prev_total_request = 0;
-
-  Init();
-
-  std::int64_t actual_flush_request =
-      options_.rate_limiter->GetTotalRequests(Env::IO_TOTAL) -
-      prev_total_request;
-  std::int64_t exepcted_flush_request = kNumFiles;
-  EXPECT_EQ(actual_flush_request, exepcted_flush_request);
-  EXPECT_EQ(actual_flush_request,
-            options_.rate_limiter->GetTotalRequests(Env::IO_HIGH));
-}
-
-TEST_F(DBRateLimiterOnWriteTest, Compact) {
-  Init();
-
-  // Pre-comaction:
-  // level-0 : `kNumFiles` SST files overlapping on [kStartKey, kEndKey]
-#ifndef ROCKSDB_LITE
-  std::string files_per_level_pre_compaction = std::to_string(kNumFiles);
-  ASSERT_EQ(files_per_level_pre_compaction, FilesPerLevel(0 /* cf */));
-#endif  // !ROCKSDB_LITE
-
-  std::int64_t prev_total_request =
-      options_.rate_limiter->GetTotalRequests(Env::IO_TOTAL);
-  ASSERT_EQ(0, options_.rate_limiter->GetTotalRequests(Env::IO_LOW));
-
-  Compact(kStartKey, kEndKey);
-
-  std::int64_t actual_compaction_request =
-      options_.rate_limiter->GetTotalRequests(Env::IO_TOTAL) -
-      prev_total_request;
-
-  // Post-comaction:
-  // level-0 : 0 SST file
-  // level-1 : 1 SST file
-#ifndef ROCKSDB_LITE
-  std::string files_per_level_post_compaction = "0,1";
-  ASSERT_EQ(files_per_level_post_compaction, FilesPerLevel(0 /* cf */));
-#endif  // !ROCKSDB_LITE
-
-  std::int64_t exepcted_compaction_request = 1;
-  EXPECT_EQ(actual_compaction_request, exepcted_compaction_request);
-  EXPECT_EQ(actual_compaction_request,
-            options_.rate_limiter->GetTotalRequests(Env::IO_LOW));
-}
-
-class DBRateLimiterOnWriteWALTest
-    : public DBRateLimiterOnWriteTest,
-      public ::testing::WithParamInterface<std::tuple<
-          bool /* WriteOptions::disableWal */,
-          bool /* Options::manual_wal_flush */,
-          Env::IOPriority /* WriteOptions::rate_limiter_priority */>> {
- public:
-  static std::string GetTestNameSuffix(
-      ::testing::TestParamInfo<std::tuple<bool, bool, Env::IOPriority>> info) {
-    std::ostringstream oss;
-    if (std::get<0>(info.param)) {
-      oss << "DisableWAL";
-    } else {
-      oss << "EnableWAL";
-    }
-    if (std::get<1>(info.param)) {
-      oss << "_ManualWALFlush";
-    } else {
-      oss << "_AutoWALFlush";
-    }
-    if (std::get<2>(info.param) == Env::IO_USER) {
-      oss << "_RateLimitAutoWALFlush";
-    } else if (std::get<2>(info.param) == Env::IO_TOTAL) {
-      oss << "_NoRateLimitAutoWALFlush";
-    } else {
-      oss << "_RateLimitAutoWALFlushWithIncorrectPriority";
-    }
-    return oss.str();
-  }
-
-  explicit DBRateLimiterOnWriteWALTest()
-      : disable_wal_(std::get<0>(GetParam())),
-        manual_wal_flush_(std::get<1>(GetParam())),
-        rate_limiter_priority_(std::get<2>(GetParam())) {}
-
-  void Init() {
-    options_ = GetOptions();
-    options_.manual_wal_flush = manual_wal_flush_;
-    Reopen(options_);
-  }
-
-  WriteOptions GetWriteOptions() {
-    WriteOptions write_options;
-    write_options.disableWAL = disable_wal_;
-    write_options.rate_limiter_priority = rate_limiter_priority_;
-    return write_options;
-  }
-
- protected:
-  bool disable_wal_;
-  bool manual_wal_flush_;
-  Env::IOPriority rate_limiter_priority_;
-};
-
-INSTANTIATE_TEST_CASE_P(
-    DBRateLimiterOnWriteWALTest, DBRateLimiterOnWriteWALTest,
-    ::testing::Values(std::make_tuple(false, false, Env::IO_TOTAL),
-                      std::make_tuple(false, false, Env::IO_USER),
-                      std::make_tuple(false, false, Env::IO_HIGH),
-                      std::make_tuple(false, true, Env::IO_USER),
-                      std::make_tuple(true, false, Env::IO_USER)),
-    DBRateLimiterOnWriteWALTest::GetTestNameSuffix);
-
-TEST_P(DBRateLimiterOnWriteWALTest, AutoWalFlush) {
-  Init();
-
-  const bool no_rate_limit_auto_wal_flush =
-      (rate_limiter_priority_ == Env::IO_TOTAL);
-  const bool valid_arg = (rate_limiter_priority_ == Env::IO_USER &&
-                          !disable_wal_ && !manual_wal_flush_);
-
-  std::int64_t prev_total_request =
-      options_.rate_limiter->GetTotalRequests(Env::IO_TOTAL);
-  ASSERT_EQ(0, options_.rate_limiter->GetTotalRequests(Env::IO_USER));
-
-  Status s = Put("foo", "v1", GetWriteOptions());
-
-  if (no_rate_limit_auto_wal_flush || valid_arg) {
-    EXPECT_TRUE(s.ok());
-  } else {
-    EXPECT_TRUE(s.IsInvalidArgument());
-    EXPECT_TRUE(s.ToString().find("WriteOptions::rate_limiter_priority") !=
-                std::string::npos);
-  }
-
-  std::int64_t actual_auto_wal_flush_request =
-      options_.rate_limiter->GetTotalRequests(Env::IO_TOTAL) -
-      prev_total_request;
-  std::int64_t expected_auto_wal_flush_request = valid_arg ? 1 : 0;
-
-  EXPECT_EQ(actual_auto_wal_flush_request, expected_auto_wal_flush_request);
-  EXPECT_EQ(actual_auto_wal_flush_request,
-            options_.rate_limiter->GetTotalRequests(Env::IO_USER));
-}
 }  // namespace ROCKSDB_NAMESPACE

 int main(int argc, char** argv) {
@@ -11,9 +11,7 @@
 #include "file/sst_file_manager_impl.h"
 #include "port/port.h"
 #include "port/stack_trace.h"
-#include "rocksdb/cache.h"
 #include "rocksdb/sst_file_manager.h"
-#include "rocksdb/table.h"
 #include "util/random.h"

 namespace ROCKSDB_NAMESPACE {
@@ -1395,69 +1393,6 @@ TEST_F(DBSSTTest, OpenDBWithInfiniteMaxOpenFiles) {
  }
 }

-TEST_F(DBSSTTest, OpenDBWithInfiniteMaxOpenFilesSubjectToMemoryLimit) {
-  for (bool reserve_table_builder_memory : {true, false}) {
-    // Open DB with infinite max open files
-    //  - First iteration use 1 thread to open files
-    //  - Second iteration use 5 threads to open files
-    for (int iter = 0; iter < 2; iter++) {
-      Options options;
-      options.create_if_missing = true;
-      options.write_buffer_size = 100000;
-      options.disable_auto_compactions = true;
-      options.max_open_files = -1;
-
-      BlockBasedTableOptions table_options;
-      options.table_factory.reset(NewBlockBasedTableFactory(table_options));
-      if (iter == 0) {
-        options.max_file_opening_threads = 1;
-      } else {
-        options.max_file_opening_threads = 5;
-      }
-
-      DestroyAndReopen(options);
-
-      // Create 5 Files in L0 (then move then to L2)
-      for (int i = 0; i < 5; i++) {
-        std::string k = "L2_" + Key(i);
-        ASSERT_OK(Put(k, k + std::string(1000, 'a')));
-        ASSERT_OK(Flush()) << i;
-      }
-      CompactRangeOptions compact_options;
-      compact_options.change_level = true;
-      compact_options.target_level = 2;
-      ASSERT_OK(db_->CompactRange(compact_options, nullptr, nullptr));
-
-      // Create 5 Files in L0
-      for (int i = 0; i < 5; i++) {
-        std::string k = "L0_" + Key(i);
-        ASSERT_OK(Put(k, k + std::string(1000, 'a')));
-        ASSERT_OK(Flush());
-      }
-      Close();
-
-      table_options.reserve_table_reader_memory = reserve_table_builder_memory;
-      table_options.block_cache =
-          NewLRUCache(1024 /* capacity */, 0 /* num_shard_bits */,
-                      true /* strict_capacity_limit */);
-      options.table_factory.reset(NewBlockBasedTableFactory(table_options));
-
-      // Reopening the DB will try to load all existing files, conditionally
-      // subject to memory limit
-      Status s = TryReopen(options);
-      if (table_options.reserve_table_reader_memory) {
-        EXPECT_TRUE(s.IsMemoryLimit());
-        EXPECT_TRUE(s.ToString().find("memory limit based on cache capacity") !=
-                    std::string::npos);
-
-      } else {
-        EXPECT_TRUE(s.ok());
-        ASSERT_EQ("5,0,5", FilesPerLevel(0));
-      }
-    }
-  }
-}
-
 TEST_F(DBSSTTest, GetTotalSstFilesSize) {
  // We don't propagate oldest-key-time table property on compaction and
  // just write 0 as default value. This affect the exact table size, since
@@ -7,7 +7,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.

-#include <memory>
 #include <unordered_set>
 #include <vector>

@@ -19,7 +18,6 @@
 #include "rocksdb/utilities/table_properties_collectors.h"
 #include "table/format.h"
 #include "table/meta_blocks.h"
-#include "table/table_properties_internal.h"
 #include "test_util/testharness.h"
 #include "test_util/testutil.h"
 #include "util/random.h"
@@ -1078,11 +1078,6 @@ void CheckColumnFamilyMeta(
      ASSERT_LE(file_meta_from_cf.file_creation_time, end_time);
      ASSERT_GE(file_meta_from_cf.oldest_ancester_time, start_time);
      ASSERT_LE(file_meta_from_cf.oldest_ancester_time, end_time);
-      // More from FileStorageInfo
-      ASSERT_EQ(file_meta_from_cf.file_type, kTableFile);
-      ASSERT_EQ(file_meta_from_cf.name,
-                "/" + file_meta_from_cf.relative_filename);
-      ASSERT_EQ(file_meta_from_cf.directory, file_meta_from_cf.db_path);
    }

    ASSERT_EQ(level_meta_from_cf.size, level_size);
@@ -1127,11 +1122,6 @@ void CheckLiveFilesMeta(
    ASSERT_EQ(meta.oldest_blob_file_number,
              expected_meta.oldest_blob_file_number);

-    // More from FileStorageInfo
-    ASSERT_EQ(meta.file_type, kTableFile);
-    ASSERT_EQ(meta.name, "/" + meta.relative_filename);
-    ASSERT_EQ(meta.directory, meta.db_path);
-
    ++i;
  }
 }
@@ -17,11 +17,11 @@
 #include "options/options_helper.h"
 #include "port/port.h"
 #include "port/stack_trace.h"
-#include "rocksdb/experimental.h"
 #include "rocksdb/iostats_context.h"
 #include "rocksdb/persistent_cache.h"
 #include "rocksdb/trace_record.h"
 #include "rocksdb/trace_record_result.h"
+#include "rocksdb/utilities/backup_engine.h"
 #include "rocksdb/utilities/replayer.h"
 #include "rocksdb/wal_filter.h"
 #include "test_util/testutil.h"
@@ -410,9 +410,6 @@ TEST_P(DBTestSharedWriteBufferAcrossCFs, SharedWriteBufferAcrossCFs) {
    ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
    ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[2]));
    ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[3]));
-    // Ensure background work is fully finished including listener callbacks
-    // before accessing listener state.
-    ASSERT_OK(dbfull()->TEST_WaitForBackgroundWork());
  };

  // Create some data and flush "default" and "nikitich" so that they
@@ -591,11 +588,6 @@ TEST_F(DBTest2, SharedWriteBufferLimitAcrossDB) {
    ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[1]));
    ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable(handles_[2]));
    ASSERT_OK(static_cast<DBImpl*>(db2)->TEST_WaitForFlushMemTable());
-    // Ensure background work is fully finished including listener callbacks
-    // before accessing listener state.
-    ASSERT_OK(dbfull()->TEST_WaitForBackgroundWork());
-    ASSERT_OK(
-        static_cast_with_check<DBImpl>(db2)->TEST_WaitForBackgroundWork());
  };

  // Trigger a flush on cf2
@@ -6909,18 +6901,122 @@ TEST_F(DBTest2, LastLevelStatistics) {
            options.statistics->getTickerCount(WARM_FILE_READ_COUNT));
 }

-TEST_F(DBTest2, CheckpointFileTemperature) {
-  class NoLinkTestFS : public FileTemperatureTestFS {
-    using FileTemperatureTestFS::FileTemperatureTestFS;
+class FileTemperatureTestFS : public FileSystemWrapper {
+ public:
+  explicit FileTemperatureTestFS(SpecialEnv* env)
+      : FileSystemWrapper(env->GetFileSystem()) {}

-    IOStatus LinkFile(const std::string&, const std::string&, const IOOptions&,
-                      IODebugContext*) override {
-      // return not supported to force checkpoint copy the file instead of just
-      // link
+  static const char* kClassName() { return "TestFileSystem"; }
+  const char* Name() const override { return kClassName(); }
+
+  IOStatus NewSequentialFile(const std::string& fname, const FileOptions& opts,
+                             std::unique_ptr<FSSequentialFile>* result,
+                             IODebugContext* dbg) override {
+    auto filename = GetFileName(fname);
+    uint64_t number;
+    FileType type;
+    auto r = ParseFileName(filename, &number, &type);
+    assert(r);
+    if (type == kTableFile) {
+      auto emplaced =
+          requested_sst_file_temperatures_.emplace(number, opts.temperature);
+      assert(emplaced.second);  // assume no duplication
+    }
+    return target()->NewSequentialFile(fname, opts, result, dbg);
+  }
+
+  IOStatus LinkFile(const std::string& s, const std::string& t,
+                    const IOOptions& options, IODebugContext* dbg) override {
+    auto filename = GetFileName(s);
+    uint64_t number;
+    FileType type;
+    auto r = ParseFileName(filename, &number, &type);
+    assert(r);
+    // return not supported to force checkpoint copy the file instead of just
+    // link
+    if (type == kTableFile) {
      return IOStatus::NotSupported();
    }
-  };
-  auto test_fs = std::make_shared<NoLinkTestFS>(env_->GetFileSystem());
+    return target()->LinkFile(s, t, options, dbg);
+  }
+
+  const std::map<uint64_t, Temperature>& RequestedSstFileTemperatures() {
+    return requested_sst_file_temperatures_;
+  }
+
+  void ClearRequestedFileTemperatures() {
+    requested_sst_file_temperatures_.clear();
+  }
+
+ private:
+  std::map<uint64_t, Temperature> requested_sst_file_temperatures_;
+
+  std::string GetFileName(const std::string& fname) {
+    auto filename = fname.substr(fname.find_last_of(kFilePathSeparator) + 1);
+    // workaround only for Windows that the file path could contain both Windows
+    // FilePathSeparator and '/'
+    filename = filename.substr(filename.find_last_of('/') + 1);
+    return filename;
+  }
+};
+
+TEST_F(DBTest2, BackupFileTemperature) {
+  std::shared_ptr<FileTemperatureTestFS> test_fs =
+      std::make_shared<FileTemperatureTestFS>(env_);
+  std::unique_ptr<Env> backup_env(new CompositeEnvWrapper(env_, test_fs));
+  Options options = CurrentOptions();
+  options.bottommost_temperature = Temperature::kWarm;
+  options.level0_file_num_compaction_trigger = 2;
+  Reopen(options);
+
+  // generate a bottommost file and a non-bottommost file
+  ASSERT_OK(Put("foo", "bar"));
+  ASSERT_OK(Put("bar", "bar"));
+  ASSERT_OK(Flush());
+  ASSERT_OK(Put("foo", "bar"));
+  ASSERT_OK(Put("bar", "bar"));
+  ASSERT_OK(Flush());
+  ASSERT_OK(dbfull()->TEST_WaitForCompact());
+  ASSERT_OK(Put("foo", "bar"));
+  ASSERT_OK(Put("bar", "bar"));
+  ASSERT_OK(Flush());
+  auto size = GetSstSizeHelper(Temperature::kWarm);
+  ASSERT_GT(size, 0);
+
+  std::map<uint64_t, Temperature> temperatures;
+  std::vector<LiveFileStorageInfo> infos;
+  ASSERT_OK(
+      dbfull()->GetLiveFilesStorageInfo(LiveFilesStorageInfoOptions(), &infos));
+  for (auto info : infos) {
+    temperatures.emplace(info.file_number, info.temperature);
+  }
+  BackupEngine* backup_engine;
+  auto backup_options = BackupEngineOptions(
+      dbname_ + kFilePathSeparator + "tempbk", backup_env.get());
+  auto s = BackupEngine::Open(backup_env.get(), backup_options, &backup_engine);
+  ASSERT_OK(s);
+  s = backup_engine->CreateNewBackup(db_);
+  ASSERT_OK(s);
+
+  // checking src file src_temperature hints: 2 sst files: 1 sst is kWarm,
+  // another is kUnknown
+  auto file_temperatures = test_fs->RequestedSstFileTemperatures();
+  ASSERT_EQ(file_temperatures.size(), 2);
+  bool has_only_one_warm_sst = false;
+  for (const auto& file_temperature : file_temperatures) {
+    ASSERT_EQ(temperatures.at(file_temperature.first), file_temperature.second);
+    if (file_temperature.second == Temperature::kWarm) {
+      ASSERT_FALSE(has_only_one_warm_sst);
+      has_only_one_warm_sst = true;
+    }
+  }
+  ASSERT_TRUE(has_only_one_warm_sst);
+  Close();
+}
+
+TEST_F(DBTest2, CheckpointFileTemperature) {
+  std::shared_ptr<FileTemperatureTestFS> test_fs =
+      std::make_shared<FileTemperatureTestFS>(env_);
  std::unique_ptr<Env> env(new CompositeEnvWrapper(env_, test_fs));
  Options options = CurrentOptions();
  options.bottommost_temperature = Temperature::kWarm;
@@ -6950,7 +7046,7 @@ TEST_F(DBTest2, CheckpointFileTemperature) {
    temperatures.emplace(info.file_number, info.temperature);
  }

-  test_fs->PopRequestedSstFileTemperatures();
+  test_fs->ClearRequestedFileTemperatures();
  Checkpoint* checkpoint;
  ASSERT_OK(Checkpoint::Create(db_, &checkpoint));
  ASSERT_OK(
@@ -6958,121 +7054,20 @@ TEST_F(DBTest2, CheckpointFileTemperature) {

  // checking src file src_temperature hints: 2 sst files: 1 sst is kWarm,
  // another is kUnknown
-  std::vector<std::pair<uint64_t, Temperature>> requested_temps;
-  test_fs->PopRequestedSstFileTemperatures(&requested_temps);
-  // Two requests
-  ASSERT_EQ(requested_temps.size(), 2);
-  std::set<uint64_t> distinct_requests;
-  for (const auto& requested_temp : requested_temps) {
-    // Matching manifest temperatures
-    ASSERT_EQ(temperatures.at(requested_temp.first), requested_temp.second);
-    distinct_requests.insert(requested_temp.first);
+  auto file_temperatures = test_fs->RequestedSstFileTemperatures();
+  ASSERT_EQ(file_temperatures.size(), 2);
+  bool has_only_one_warm_sst = false;
+  for (const auto& file_temperature : file_temperatures) {
+    ASSERT_EQ(temperatures.at(file_temperature.first), file_temperature.second);
+    if (file_temperature.second == Temperature::kWarm) {
+      ASSERT_FALSE(has_only_one_warm_sst);
+      has_only_one_warm_sst = true;
+    }
  }
-  // Each request to distinct file
-  ASSERT_EQ(distinct_requests.size(), requested_temps.size());
-
+  ASSERT_TRUE(has_only_one_warm_sst);
  delete checkpoint;
  Close();
 }
-
-TEST_F(DBTest2, FileTemperatureManifestFixup) {
-  auto test_fs = std::make_shared<FileTemperatureTestFS>(env_->GetFileSystem());
-  std::unique_ptr<Env> env(new CompositeEnvWrapper(env_, test_fs));
-  Options options = CurrentOptions();
-  options.bottommost_temperature = Temperature::kWarm;
-  options.level0_file_num_compaction_trigger = 2;
-  options.env = env.get();
-  std::vector<std::string> cfs = {/*"default",*/ "test1", "test2"};
-  CreateAndReopenWithCF(cfs, options);
-  // Needed for later re-opens (weird)
-  cfs.insert(cfs.begin(), kDefaultColumnFamilyName);
-
-  // Generate a bottommost file in all CFs
-  for (int cf = 0; cf < 3; ++cf) {
-    ASSERT_OK(Put(cf, "a", "val"));
-    ASSERT_OK(Put(cf, "c", "val"));
-    ASSERT_OK(Flush(cf));
-    ASSERT_OK(Put(cf, "b", "val"));
-    ASSERT_OK(Put(cf, "d", "val"));
-    ASSERT_OK(Flush(cf));
-  }
-  ASSERT_OK(dbfull()->TEST_WaitForCompact());
-
-  // verify
-  ASSERT_GT(GetSstSizeHelper(Temperature::kWarm), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kUnknown), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kCold), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kHot), 0);
-
-  // Generate a non-bottommost file in all CFs
-  for (int cf = 0; cf < 3; ++cf) {
-    ASSERT_OK(Put(cf, "e", "val"));
-    ASSERT_OK(Flush(cf));
-  }
-
-  // re-verify
-  ASSERT_GT(GetSstSizeHelper(Temperature::kWarm), 0);
-  // Not supported: ASSERT_GT(GetSstSizeHelper(Temperature::kUnknown), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kCold), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kHot), 0);
-
-  // Now change FS temperature on bottommost file(s) to kCold
-  std::map<uint64_t, Temperature> current_temps;
-  test_fs->CopyCurrentSstFileTemperatures(&current_temps);
-  for (auto e : current_temps) {
-    if (e.second == Temperature::kWarm) {
-      test_fs->OverrideSstFileTemperature(e.first, Temperature::kCold);
-    }
-  }
-  // Metadata not yet updated
-  ASSERT_EQ(Get("a"), "val");
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kCold), 0);
-
-  // Update with Close and UpdateManifestForFilesState, but first save cf
-  // descriptors
-  std::vector<ColumnFamilyDescriptor> column_families;
-  for (size_t i = 0; i < handles_.size(); ++i) {
-    ColumnFamilyDescriptor cfdescriptor;
-    // GetDescriptor is not implemented for ROCKSDB_LITE
-    handles_[i]->GetDescriptor(&cfdescriptor).PermitUncheckedError();
-    column_families.push_back(cfdescriptor);
-  }
-  Close();
-  experimental::UpdateManifestForFilesStateOptions update_opts;
-  update_opts.update_temperatures = true;
-
-  ASSERT_OK(experimental::UpdateManifestForFilesState(
-      options, dbname_, column_families, update_opts));
-
-  // Re-open and re-verify after update
-  ReopenWithColumnFamilies(cfs, options);
-  ASSERT_GT(GetSstSizeHelper(Temperature::kCold), 0);
-  // Not supported: ASSERT_GT(GetSstSizeHelper(Temperature::kUnknown), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kWarm), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kHot), 0);
-
-  // Change kUnknown to kHot
-  test_fs->CopyCurrentSstFileTemperatures(&current_temps);
-  for (auto e : current_temps) {
-    if (e.second == Temperature::kUnknown) {
-      test_fs->OverrideSstFileTemperature(e.first, Temperature::kHot);
-    }
-  }
-
-  // Update with Close and UpdateManifestForFilesState
-  Close();
-  ASSERT_OK(experimental::UpdateManifestForFilesState(
-      options, dbname_, column_families, update_opts));
-
-  // Re-open and re-verify after update
-  ReopenWithColumnFamilies(cfs, options);
-  ASSERT_GT(GetSstSizeHelper(Temperature::kCold), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kUnknown), 0);
-  ASSERT_EQ(GetSstSizeHelper(Temperature::kWarm), 0);
-  ASSERT_GT(GetSstSizeHelper(Temperature::kHot), 0);
-
-  Close();
-}
 #endif  // ROCKSDB_LITE

 // WAL recovery mode is WALRecoveryMode::kPointInTimeRecovery.
@@ -14,7 +14,6 @@
 #include <algorithm>
 #include <cinttypes>
 #include <map>
-#include <memory>
 #include <set>
 #include <string>
 #include <thread>
@@ -24,15 +23,12 @@

 #include "db/db_impl/db_impl.h"
 #include "file/filename.h"
-#include "rocksdb/advanced_options.h"
 #include "rocksdb/cache.h"
 #include "rocksdb/compaction_filter.h"
 #include "rocksdb/convenience.h"
 #include "rocksdb/db.h"
 #include "rocksdb/env.h"
-#include "rocksdb/file_system.h"
 #include "rocksdb/filter_policy.h"
-#include "rocksdb/io_status.h"
 #include "rocksdb/options.h"
 #include "rocksdb/slice.h"
 #include "rocksdb/sst_file_writer.h"
@@ -691,121 +687,6 @@ class SpecialEnv : public EnvWrapper {
 };

 #ifndef ROCKSDB_LITE
-class FileTemperatureTestFS : public FileSystemWrapper {
- public:
-  explicit FileTemperatureTestFS(const std::shared_ptr<FileSystem>& fs)
-      : FileSystemWrapper(fs) {}
-
-  static const char* kClassName() { return "FileTemperatureTestFS"; }
-  const char* Name() const override { return kClassName(); }
-
-  IOStatus NewSequentialFile(const std::string& fname, const FileOptions& opts,
-                             std::unique_ptr<FSSequentialFile>* result,
-                             IODebugContext* dbg) override {
-    IOStatus s = target()->NewSequentialFile(fname, opts, result, dbg);
-    uint64_t number;
-    FileType type;
-    if (ParseFileName(GetFileName(fname), &number, &type) &&
-        type == kTableFile) {
-      MutexLock lock(&mu_);
-      requested_sst_file_temperatures_.emplace_back(number, opts.temperature);
-      if (s.ok()) {
-        *result = WrapWithTemperature<FSSequentialFileOwnerWrapper>(
-            number, std::move(*result));
-      }
-    }
-    return s;
-  }
-
-  IOStatus NewRandomAccessFile(const std::string& fname,
-                               const FileOptions& opts,
-                               std::unique_ptr<FSRandomAccessFile>* result,
-                               IODebugContext* dbg) override {
-    IOStatus s = target()->NewRandomAccessFile(fname, opts, result, dbg);
-    uint64_t number;
-    FileType type;
-    if (ParseFileName(GetFileName(fname), &number, &type) &&
-        type == kTableFile) {
-      MutexLock lock(&mu_);
-      requested_sst_file_temperatures_.emplace_back(number, opts.temperature);
-      if (s.ok()) {
-        *result = WrapWithTemperature<FSRandomAccessFileOwnerWrapper>(
-            number, std::move(*result));
-      }
-    }
-    return s;
-  }
-
-  void PopRequestedSstFileTemperatures(
-      std::vector<std::pair<uint64_t, Temperature>>* out = nullptr) {
-    MutexLock lock(&mu_);
-    if (out) {
-      *out = std::move(requested_sst_file_temperatures_);
-      assert(requested_sst_file_temperatures_.empty());
-    } else {
-      requested_sst_file_temperatures_.clear();
-    }
-  }
-
-  IOStatus NewWritableFile(const std::string& fname, const FileOptions& opts,
-                           std::unique_ptr<FSWritableFile>* result,
-                           IODebugContext* dbg) override {
-    uint64_t number;
-    FileType type;
-    if (ParseFileName(GetFileName(fname), &number, &type) &&
-        type == kTableFile) {
-      MutexLock lock(&mu_);
-      current_sst_file_temperatures_[number] = opts.temperature;
-    }
-    return target()->NewWritableFile(fname, opts, result, dbg);
-  }
-
-  void CopyCurrentSstFileTemperatures(std::map<uint64_t, Temperature>* out) {
-    MutexLock lock(&mu_);
-    *out = current_sst_file_temperatures_;
-  }
-
-  void OverrideSstFileTemperature(uint64_t number, Temperature temp) {
-    MutexLock lock(&mu_);
-    current_sst_file_temperatures_[number] = temp;
-  }
-
- protected:
-  port::Mutex mu_;
-  std::vector<std::pair<uint64_t, Temperature>>
-      requested_sst_file_temperatures_;
-  std::map<uint64_t, Temperature> current_sst_file_temperatures_;
-
-  std::string GetFileName(const std::string& fname) {
-    auto filename = fname.substr(fname.find_last_of(kFilePathSeparator) + 1);
-    // workaround only for Windows that the file path could contain both Windows
-    // FilePathSeparator and '/'
-    filename = filename.substr(filename.find_last_of('/') + 1);
-    return filename;
-  }
-
-  template <class FileOwnerWrapperT, /*inferred*/ class FileT>
-  std::unique_ptr<FileT> WrapWithTemperature(uint64_t number,
-                                             std::unique_ptr<FileT>&& t) {
-    class FileWithTemp : public FileOwnerWrapperT {
-     public:
-      FileWithTemp(FileTemperatureTestFS* fs, uint64_t number,
-                   std::unique_ptr<FileT>&& t)
-          : FileOwnerWrapperT(std::move(t)), fs_(fs), number_(number) {}
-
-      Temperature GetTemperature() const override {
-        MutexLock lock(&fs_->mu_);
-        return fs_->current_sst_file_temperatures_[number_];
-      }
-
-     private:
-      FileTemperatureTestFS* fs_;
-      uint64_t number_;
-    };
-    return std::make_unique<FileWithTemp>(this, number, std::move(t));
-  }
-};
-
 class OnFileDeletionListener : public EventListener {
 public:
  OnFileDeletionListener() : matched_count_(0), expected_file_name_("") {}
@@ -894,8 +775,8 @@ class CacheWrapper : public Cache {
  bool Ref(Handle* handle) override { return target_->Ref(handle); }

  using Cache::Release;
-  bool Release(Handle* handle, bool erase_if_last_ref = false) override {
-    return target_->Release(handle, erase_if_last_ref);
+  bool Release(Handle* handle, bool force_erase = false) override {
+    return target_->Release(handle, force_erase);
  }

  void* Value(Handle* handle) override { return target_->Value(handle); }
@@ -704,77 +704,6 @@ TEST_F(DBBasicTestWithTimestamp, SimpleIterate) {
  Close();
 }

-TEST_F(DBBasicTestWithTimestamp, TrimHistoryTest) {
-  Options options = CurrentOptions();
-  options.env = env_;
-  options.create_if_missing = true;
-  const size_t kTimestampSize = Timestamp(0, 0).size();
-  TestComparator test_cmp(kTimestampSize);
-  options.comparator = &test_cmp;
-  DestroyAndReopen(options);
-  auto check_value_by_ts = [](DB* db, Slice key, std::string readTs,
-                              Status status, std::string checkValue) {
-    ReadOptions ropts;
-    Slice ts = readTs;
-    ropts.timestamp = &ts;
-    std::string value;
-    Status s = db->Get(ropts, key, &value);
-    ASSERT_TRUE(s == status);
-    if (s.ok()) {
-      ASSERT_EQ(checkValue, value);
-    }
-  };
-  // Construct data of different versions with different ts
-  ASSERT_OK(db_->Put(WriteOptions(), "k1", Timestamp(2, 0), "v1"));
-  ASSERT_OK(db_->Put(WriteOptions(), "k1", Timestamp(4, 0), "v2"));
-  ASSERT_OK(db_->Delete(WriteOptions(), "k1", Timestamp(5, 0)));
-  ASSERT_OK(db_->Put(WriteOptions(), "k1", Timestamp(6, 0), "v3"));
-  check_value_by_ts(db_, "k1", Timestamp(7, 0), Status::OK(), "v3");
-  ASSERT_OK(Flush());
-  Close();
-
-  ColumnFamilyOptions cf_options(options);
-  std::vector<ColumnFamilyDescriptor> column_families;
-  column_families.push_back(
-      ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
-  DBOptions db_options(options);
-
-  // Trim data whose version > Timestamp(5, 0), read(k1, ts(7)) <- NOT_FOUND.
-  ASSERT_OK(DB::OpenAndTrimHistory(db_options, dbname_, column_families,
-                                   &handles_, &db_, Timestamp(5, 0)));
-  check_value_by_ts(db_, "k1", Timestamp(7, 0), Status::NotFound(), "");
-  Close();
-
-  // Trim data whose timestamp > Timestamp(4, 0), read(k1, ts(7)) <- v2
-  ASSERT_OK(DB::OpenAndTrimHistory(db_options, dbname_, column_families,
-                                   &handles_, &db_, Timestamp(4, 0)));
-  check_value_by_ts(db_, "k1", Timestamp(7, 0), Status::OK(), "v2");
-  Close();
-}
-
-TEST_F(DBBasicTestWithTimestamp, OpenAndTrimHistoryInvalidOptionTest) {
-  Destroy(last_options_);
-
-  Options options = CurrentOptions();
-  options.env = env_;
-  options.create_if_missing = true;
-  const size_t kTimestampSize = Timestamp(0, 0).size();
-  TestComparator test_cmp(kTimestampSize);
-  options.comparator = &test_cmp;
-
-  ColumnFamilyOptions cf_options(options);
-  std::vector<ColumnFamilyDescriptor> column_families;
-  column_families.push_back(
-      ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
-  DBOptions db_options(options);
-
-  // OpenAndTrimHistory should not work with avoid_flush_during_recovery
-  db_options.avoid_flush_during_recovery = true;
-  ASSERT_TRUE(DB::OpenAndTrimHistory(db_options, dbname_, column_families,
-                                     &handles_, &db_, Timestamp(0, 0))
-                  .IsInvalidArgument());
-}
-
 #ifndef ROCKSDB_LITE
 TEST_F(DBBasicTestWithTimestamp, GetTimestampTableProperties) {
  Options options = CurrentOptions();
@@ -207,13 +207,6 @@ inline Slice ExtractTimestampFromUserKey(const Slice& user_key, size_t ts_sz) {
  return Slice(user_key.data() + user_key.size() - ts_sz, ts_sz);
 }

-inline Slice ExtractTimestampFromKey(const Slice& internal_key, size_t ts_sz) {
-  const size_t key_size = internal_key.size();
-  assert(key_size >= kNumInternalBytes + ts_sz);
-  return Slice(internal_key.data() + key_size - ts_sz - kNumInternalBytes,
-               ts_sz);
-}
-
 inline uint64_t ExtractInternalKeyFooter(const Slice& internal_key) {
  assert(internal_key.size() >= kNumInternalBytes);
  const size_t n = internal_key.size();
@@ -272,8 +272,8 @@ STATIC_AVOID_DESTRUCTION(const Status, kOkStatus){Status::OK()};
 // This can also get called as part of a recovery operation. In that case, we
 // also track the error separately in recovery_error_ so we can tell in the
 // end whether recovery succeeded or not
-const Status& ErrorHandler::HandleKnownErrors(const Status& bg_err,
-                                              BackgroundErrorReason reason) {
+const Status& ErrorHandler::SetBGError(const Status& bg_err,
+                                       BackgroundErrorReason reason) {
  db_mutex_->AssertHeld();
  if (bg_err.ok()) {
    return kOkStatus;
@@ -382,12 +382,9 @@ const Status& ErrorHandler::HandleKnownErrors(const Status& bg_err,
 //    c) all other errors are mapped to hard error.
 // 3) for other cases, SetBGError(const Status& bg_err, BackgroundErrorReason
 //    reason) will be called to handle other error cases.
-const Status& ErrorHandler::SetBGError(const Status& bg_status,
+const Status& ErrorHandler::SetBGError(const IOStatus& bg_io_err,
                                       BackgroundErrorReason reason) {
  db_mutex_->AssertHeld();
-  Status tmp_status = bg_status;
-  IOStatus bg_io_err = status_to_io_status(std::move(tmp_status));
-
  if (bg_io_err.ok()) {
    return kOkStatus;
  }
@@ -486,11 +483,7 @@ const Status& ErrorHandler::SetBGError(const Status& bg_status,
    if (bg_error_stats_ != nullptr) {
      RecordTick(bg_error_stats_.get(), ERROR_HANDLER_BG_IO_ERROR_COUNT);
    }
-    // HandleKnownErrors() will use recovery_error_, so ignore
-    // recovery_io_error_.
-    // TODO: Do some refactoring and use only one recovery_error_
-    recovery_io_error_.PermitUncheckedError();
-    return HandleKnownErrors(new_bg_io_err, reason);
+    return SetBGError(new_bg_io_err, reason);
  }
 }

@@ -53,6 +53,9 @@ class ErrorHandler {

   const Status& SetBGError(const Status& bg_err, BackgroundErrorReason reason);

+   const Status& SetBGError(const IOStatus& bg_io_err,
+                            BackgroundErrorReason reason);
+
   Status GetBGError() const { return bg_error_; }

   Status GetRecoveryError() const { return recovery_error_; }
@@ -109,8 +112,6 @@ class ErrorHandler {
    // The pointer of DB statistics.
    std::shared_ptr<Statistics> bg_error_stats_;

-    const Status& HandleKnownErrors(const Status& bg_err,
-                                    BackgroundErrorReason reason);
    Status OverrideNoSpaceError(const Status& bg_error, bool* auto_recovery);
    void RecoverFromNoSpace();
    const Status& StartRecoverFromRetryableBGIOError(const IOStatus& io_error);
@@ -2468,210 +2468,6 @@ TEST_F(DBErrorHandlingFSTest, FLushWritRetryableErrorAbortRecovery) {
  Destroy(options);
 }

-TEST_F(DBErrorHandlingFSTest, FlushReadError) {
-  std::shared_ptr<ErrorHandlerFSListener> listener =
-      std::make_shared<ErrorHandlerFSListener>();
-  Options options = GetDefaultOptions();
-  options.env = fault_env_.get();
-  options.create_if_missing = true;
-  options.listeners.emplace_back(listener);
-  options.statistics = CreateDBStatistics();
-  Status s;
-
-  listener->EnableAutoRecovery(false);
-  DestroyAndReopen(options);
-
-  ASSERT_OK(Put(Key(0), "val"));
-  SyncPoint::GetInstance()->SetCallBack(
-      "BuildTable:BeforeOutputValidation", [&](void*) {
-        IOStatus st = IOStatus::IOError();
-        st.SetRetryable(true);
-        st.SetScope(IOStatus::IOErrorScope::kIOErrorScopeFile);
-        fault_fs_->SetFilesystemActive(false, st);
-      });
-  SyncPoint::GetInstance()->SetCallBack(
-      "BuildTable:BeforeDeleteFile",
-      [&](void*) { fault_fs_->SetFilesystemActive(true, IOStatus::OK()); });
-  SyncPoint::GetInstance()->EnableProcessing();
-  s = Flush();
-  ASSERT_EQ(s.severity(), ROCKSDB_NAMESPACE::Status::Severity::kSoftError);
-  SyncPoint::GetInstance()->DisableProcessing();
-  fault_fs_->SetFilesystemActive(true);
-  ASSERT_EQ(listener->WaitForRecovery(5000000), true);
-  ASSERT_EQ(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_ERROR_COUNT));
-  ASSERT_EQ(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_IO_ERROR_COUNT));
-  ASSERT_EQ(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_RETRYABLE_IO_ERROR_COUNT));
-  ASSERT_LE(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_AUTORESUME_COUNT));
-  ASSERT_LE(0, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_AUTORESUME_RETRY_TOTAL_COUNT));
-  s = dbfull()->TEST_GetBGError();
-  ASSERT_OK(s);
-
-  Reopen(GetDefaultOptions());
-  ASSERT_EQ("val", Get(Key(0)));
-}
-
-TEST_F(DBErrorHandlingFSTest, AtomicFlushReadError) {
-  std::shared_ptr<ErrorHandlerFSListener> listener =
-      std::make_shared<ErrorHandlerFSListener>();
-  Options options = GetDefaultOptions();
-  options.env = fault_env_.get();
-  options.create_if_missing = true;
-  options.listeners.emplace_back(listener);
-  options.statistics = CreateDBStatistics();
-  Status s;
-
-  listener->EnableAutoRecovery(false);
-  options.atomic_flush = true;
-  CreateAndReopenWithCF({"pikachu"}, options);
-
-  ASSERT_OK(Put(0, Key(0), "val"));
-  ASSERT_OK(Put(1, Key(0), "val"));
-  SyncPoint::GetInstance()->SetCallBack(
-      "BuildTable:BeforeOutputValidation", [&](void*) {
-        IOStatus st = IOStatus::IOError();
-        st.SetRetryable(true);
-        st.SetScope(IOStatus::IOErrorScope::kIOErrorScopeFile);
-        fault_fs_->SetFilesystemActive(false, st);
-      });
-  SyncPoint::GetInstance()->SetCallBack(
-      "BuildTable:BeforeDeleteFile",
-      [&](void*) { fault_fs_->SetFilesystemActive(true, IOStatus::OK()); });
-  SyncPoint::GetInstance()->EnableProcessing();
-  s = Flush({0, 1});
-  ASSERT_EQ(s.severity(), ROCKSDB_NAMESPACE::Status::Severity::kSoftError);
-  SyncPoint::GetInstance()->DisableProcessing();
-  fault_fs_->SetFilesystemActive(true);
-  ASSERT_EQ(listener->WaitForRecovery(5000000), true);
-  ASSERT_EQ(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_ERROR_COUNT));
-  ASSERT_EQ(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_IO_ERROR_COUNT));
-  ASSERT_EQ(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_RETRYABLE_IO_ERROR_COUNT));
-  ASSERT_LE(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_AUTORESUME_COUNT));
-  ASSERT_LE(0, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_AUTORESUME_RETRY_TOTAL_COUNT));
-  s = dbfull()->TEST_GetBGError();
-  ASSERT_OK(s);
-
-  TryReopenWithColumnFamilies({kDefaultColumnFamilyName, "pikachu"},
-                              GetDefaultOptions());
-  ASSERT_EQ("val", Get(Key(0)));
-}
-
-TEST_F(DBErrorHandlingFSTest, AtomicFlushNoSpaceError) {
-  std::shared_ptr<ErrorHandlerFSListener> listener =
-      std::make_shared<ErrorHandlerFSListener>();
-  Options options = GetDefaultOptions();
-  options.env = fault_env_.get();
-  options.create_if_missing = true;
-  options.listeners.emplace_back(listener);
-  options.statistics = CreateDBStatistics();
-  Status s;
-
-  listener->EnableAutoRecovery(true);
-  options.atomic_flush = true;
-  CreateAndReopenWithCF({"pikachu"}, options);
-
-  ASSERT_OK(Put(0, Key(0), "val"));
-  ASSERT_OK(Put(1, Key(0), "val"));
-  SyncPoint::GetInstance()->SetCallBack("BuildTable:create_file", [&](void*) {
-    IOStatus st = IOStatus::NoSpace();
-    fault_fs_->SetFilesystemActive(false, st);
-  });
-  SyncPoint::GetInstance()->SetCallBack(
-      "BuildTable:BeforeDeleteFile",
-      [&](void*) { fault_fs_->SetFilesystemActive(true, IOStatus::OK()); });
-  SyncPoint::GetInstance()->EnableProcessing();
-  s = Flush({0, 1});
-  ASSERT_EQ(s.severity(), ROCKSDB_NAMESPACE::Status::Severity::kHardError);
-  SyncPoint::GetInstance()->DisableProcessing();
-  fault_fs_->SetFilesystemActive(true);
-  ASSERT_EQ(listener->WaitForRecovery(5000000), true);
-  ASSERT_LE(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_ERROR_COUNT));
-  ASSERT_LE(1, options.statistics->getAndResetTickerCount(
-                   ERROR_HANDLER_BG_IO_ERROR_COUNT));
-  s = dbfull()->TEST_GetBGError();
-  ASSERT_OK(s);
-
-  TryReopenWithColumnFamilies({kDefaultColumnFamilyName, "pikachu"},
-                              GetDefaultOptions());
-  ASSERT_EQ("val", Get(Key(0)));
-}
-
-TEST_F(DBErrorHandlingFSTest, CompactionReadRetryableErrorAutoRecover) {
-  // In this test, in the first round of compaction, the FS is set to error.
-  // So the first compaction fails due to retryable IO error and it is mapped
-  // to soft error. Then, compaction is rescheduled, in the second round of
-  // compaction, the FS is set to active and compaction is successful, so
-  // the test will hit the CompactionJob::FinishCompactionOutputFile1 sync
-  // point.
-  std::shared_ptr<ErrorHandlerFSListener> listener =
-      std::make_shared<ErrorHandlerFSListener>();
-  Options options = GetDefaultOptions();
-  options.env = fault_env_.get();
-  options.create_if_missing = true;
-  options.level0_file_num_compaction_trigger = 2;
-  options.listeners.emplace_back(listener);
-  BlockBasedTableOptions table_options;
-  table_options.no_block_cache = true;
-  options.table_factory.reset(NewBlockBasedTableFactory(table_options));
-  Status s;
-  std::atomic<bool> fail_first(false);
-  std::atomic<bool> fail_second(true);
-  Random rnd(301);
-  DestroyAndReopen(options);
-
-  IOStatus error_msg = IOStatus::IOError("Retryable IO Error");
-  error_msg.SetRetryable(true);
-
-  for (int i = 0; i < 100; ++i) {
-    ASSERT_OK(Put(Key(i), rnd.RandomString(1024)));
-  }
-  s = Flush();
-  ASSERT_OK(s);
-
-  listener->OverrideBGError(Status(error_msg, Status::Severity::kHardError));
-  listener->EnableAutoRecovery(false);
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->LoadDependency(
-      {{"DBImpl::FlushMemTable:FlushMemTableFinished",
-        "BackgroundCallCompaction:0"},
-       {"CompactionJob::FinishCompactionOutputFile1",
-        "CompactionWriteRetryableErrorAutoRecover0"}});
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
-      "DBImpl::BackgroundCompaction:Start",
-      [&](void*) { fault_fs_->SetFilesystemActive(true); });
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
-      "BackgroundCallCompaction:0", [&](void*) { fail_first.store(true); });
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->SetCallBack(
-      "CompactionJob::Run():PausingManualCompaction:2", [&](void*) {
-        if (fail_first.load() && fail_second.load()) {
-          fault_fs_->SetFilesystemActive(false, error_msg);
-          fail_second.store(false);
-        }
-      });
-  ROCKSDB_NAMESPACE::SyncPoint::GetInstance()->EnableProcessing();
-
-  ASSERT_OK(Put(Key(1), "val"));
-  s = Flush();
-  ASSERT_OK(s);
-
-  s = dbfull()->TEST_WaitForCompact();
-  ASSERT_OK(s);
-  TEST_SYNC_POINT("CompactionWriteRetryableErrorAutoRecover0");
-  SyncPoint::GetInstance()->ClearAllCallBacks();
-  SyncPoint::GetInstance()->DisableProcessing();
-
-  Reopen(GetDefaultOptions());
-}
-
 class DBErrorHandlingFencingTest : public DBErrorHandlingFSTest,
                                   public testing::WithParamInterface<bool> {};

@@ -6,8 +6,6 @@
 #include "rocksdb/experimental.h"

 #include "db/db_impl/db_impl.h"
-#include "db/version_util.h"
-#include "logging/logging.h"

 namespace ROCKSDB_NAMESPACE {
 namespace experimental {
@@ -48,103 +46,5 @@ Status SuggestCompactRange(DB* db, const Slice* begin, const Slice* end) {
  return SuggestCompactRange(db, db->DefaultColumnFamily(), begin, end);
 }

-Status UpdateManifestForFilesState(
-    const DBOptions& db_opts, const std::string& db_name,
-    const std::vector<ColumnFamilyDescriptor>& column_families,
-    const UpdateManifestForFilesStateOptions& opts) {
-  OfflineManifestWriter w(db_opts, db_name);
-  Status s = w.Recover(column_families);
-
-  size_t files_updated = 0;
-  size_t cfs_updated = 0;
-  auto fs = db_opts.env->GetFileSystem();
-
-  for (auto cfd : *w.Versions().GetColumnFamilySet()) {
-    if (!s.ok()) {
-      break;
-    }
-    assert(cfd);
-
-    if (cfd->IsDropped() || !cfd->initialized()) {
-      continue;
-    }
-
-    const auto* current = cfd->current();
-    assert(current);
-
-    const auto* vstorage = current->storage_info();
-    assert(vstorage);
-
-    VersionEdit edit;
-    edit.SetColumnFamily(cfd->GetID());
-
-    /* SST files */
-    for (int level = 0; level < cfd->NumberLevels(); level++) {
-      if (!s.ok()) {
-        break;
-      }
-      const auto& level_files = vstorage->LevelFiles(level);
-
-      for (const auto& lf : level_files) {
-        assert(lf);
-
-        uint64_t number = lf->fd.GetNumber();
-        std::string fname =
-            TableFileName(w.IOptions().db_paths, number, lf->fd.GetPathId());
-
-        std::unique_ptr<FSSequentialFile> f;
-        FileOptions fopts;
-        fopts.temperature = lf->temperature;
-
-        IOStatus file_ios =
-            fs->NewSequentialFile(fname, fopts, &f, /*dbg*/ nullptr);
-        if (file_ios.ok()) {
-          if (opts.update_temperatures) {
-            Temperature temp = f->GetTemperature();
-            if (temp != Temperature::kUnknown && temp != lf->temperature) {
-              // Current state inconsistent with manifest
-              ++files_updated;
-              edit.DeleteFile(level, number);
-              edit.AddFile(level, number, lf->fd.GetPathId(),
-                           lf->fd.GetFileSize(), lf->smallest, lf->largest,
-                           lf->fd.smallest_seqno, lf->fd.largest_seqno,
-                           lf->marked_for_compaction, temp,
-                           lf->oldest_blob_file_number,
-                           lf->oldest_ancester_time, lf->file_creation_time,
-                           lf->file_checksum, lf->file_checksum_func_name,
-                           lf->min_timestamp, lf->max_timestamp);
-            }
-          }
-        } else {
-          s = file_ios;
-          break;
-        }
-      }
-    }
-
-    if (s.ok() && edit.NumEntries() > 0) {
-      s = w.LogAndApply(cfd, &edit);
-      if (s.ok()) {
-        ++cfs_updated;
-      }
-    }
-  }
-
-  if (cfs_updated > 0) {
-    ROCKS_LOG_INFO(db_opts.info_log,
-                   "UpdateManifestForFilesState: updated %zu files in %zu CFs",
-                   files_updated, cfs_updated);
-  } else if (s.ok()) {
-    ROCKS_LOG_INFO(db_opts.info_log,
-                   "UpdateManifestForFilesState: no updates needed");
-  }
-  if (!s.ok()) {
-    ROCKS_LOG_ERROR(db_opts.info_log, "UpdateManifestForFilesState failed: %s",
-                    s.ToString().c_str());
-  }
-
-  return s;
-}
-
 }  // namespace experimental
 }  // namespace ROCKSDB_NAMESPACE
@@ -171,69 +171,6 @@ TEST_F(FileNameTest, Construction) {
  ASSERT_EQ(kMetaDatabase, type);
 }

-TEST_F(FileNameTest, NormalizePath) {
-  // No leading slash
-  const std::string sep = std::string(1, kFilePathSeparator);
-
-  std::string expected = "FOLDER" + sep + "filename.ext";
-  std::string given = "FOLDER" + sep + "filename.ext";
-
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // Two chars /a
-
-  expected = sep + "a";
-  given = expected;
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // Two chars a/
-  expected = "a" + sep;
-  given = expected;
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // Server only
-  expected = sep + sep + "a";
-  given = expected;
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // Two slashes after character
-  expected = "a" + sep;
-  given = "a" + sep + sep;
-
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // slash only   /
-  expected = sep;
-  given = expected;
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // UNC only   //
-  expected = sep;
-  given = sep + sep;
-
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // 3 slashesy   //
-  expected = sep + sep;
-  given = sep + sep + sep;
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // 3 slashes   //
-  expected = sep + sep + "a" + sep;
-  given = sep + sep + sep + "a" + sep;
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // 2 separators in the middle
-  expected = "a" + sep + "b";
-  given = "a" + sep + sep + "b";
-  ASSERT_EQ(expected, NormalizePath(given));
-
-  // UNC with duplicate slashes
-  expected = sep + sep + "SERVER" + sep + "a" + sep + "b" + sep + "c";
-  given = sep + sep + "SERVER" + sep + "a" + sep + sep + "b" + sep + "c";
-  ASSERT_EQ(expected, NormalizePath(given));
-}
-
 }  // namespace ROCKSDB_NAMESPACE

 int main(int argc, char** argv) {
@@ -136,6 +136,7 @@ FlushJob::FlushJob(
 }

 FlushJob::~FlushJob() {
+  io_status_.PermitUncheckedError();
  ThreadStatusUtil::ResetThreadStatus();
 }

@@ -169,20 +170,8 @@ void FlushJob::PickMemTable() {
  db_mutex_->AssertHeld();
  assert(!pick_memtable_called);
  pick_memtable_called = true;
-
-  // Maximum "NextLogNumber" of the memtables to flush.
-  // When mempurge feature is turned off, this variable is useless
-  // because the memtables are implicitly sorted by increasing order of creation
-  // time. Therefore mems_->back()->GetNextLogNumber() is already equal to
-  // max_next_log_number. However when Mempurge is on, the memtables are no
-  // longer sorted by increasing order of creation time. Therefore this variable
-  // becomes necessary because mems_->back()->GetNextLogNumber() is no longer
-  // necessarily equal to max_next_log_number.
-  uint64_t max_next_log_number = 0;
-
  // Save the contents of the earliest memtable as a new Table
-  cfd_->imm()->PickMemtablesToFlush(max_memtable_id_, &mems_,
-                                    &max_next_log_number);
+  cfd_->imm()->PickMemtablesToFlush(max_memtable_id_, &mems_);
  if (mems_.empty()) {
    return;
  }
@@ -197,7 +186,7 @@ void FlushJob::PickMemTable() {
  edit_->SetPrevLogNumber(0);
  // SetLogNumber(log_num) indicates logs with number smaller than log_num
  // will no longer be picked up for recovery.
-  edit_->SetLogNumber(max_next_log_number);
+  edit_->SetLogNumber(mems_.back()->GetNextLogNumber());
  edit_->SetColumnFamily(cfd_->GetID());

  // path 0 for level 0 file.
@@ -289,13 +278,17 @@ Status FlushJob::Run(LogsWithPrepTracker* prep_tracker, FileMetaData* file_meta,
  } else if (write_manifest_) {
    TEST_SYNC_POINT("FlushJob::InstallResults");
    // Replace immutable memtable with the generated Table
+    IOStatus tmp_io_s;
    s = cfd_->imm()->TryInstallMemtableFlushResults(
        cfd_, mutable_cf_options_, mems_, prep_tracker, versions_, db_mutex_,
        meta_.fd.GetNumber(), &job_context_->memtables_to_free, db_directory_,
-        log_buffer_, &committed_flush_jobs_info_,
+        log_buffer_, &committed_flush_jobs_info_, &tmp_io_s,
        !(mempurge_s.ok()) /* write_edit : true if no mempurge happened (or if aborted),
                              but 'false' if mempurge successful: no new min log number
                              or new level 0 file path to write to manifest. */);
+    if (!tmp_io_s.ok()) {
+      io_status_ = tmp_io_s;
+    }
  }

  if (s.ok() && file_meta != nullptr) {
@@ -576,7 +569,6 @@ Status FlushJob::MemPurge() {
        uint64_t new_mem_id = mems_[0]->GetID();

        new_mem->SetID(new_mem_id);
-        new_mem->SetNextLogNumber(mems_[0]->GetNextLogNumber());

        // This addition will not trigger another flush, because
        // we do not call SchedulePendingFlush().
@@ -823,12 +815,6 @@ Status FlushJob::WriteLevel0Table() {
    uint64_t total_num_entries = 0, total_num_deletes = 0;
    uint64_t total_data_size = 0;
    size_t total_memory_usage = 0;
-    // Used for testing:
-    uint64_t mems_size = mems_.size();
-    (void)mems_size;  // avoids unused variable error when
-                      // TEST_SYNC_POINT_CALLBACK not used.
-    TEST_SYNC_POINT_CALLBACK("FlushJob::WriteLevel0Table:num_memtables",
-                             &mems_size);
    for (MemTable* m : mems_) {
      ROCKS_LOG_INFO(
          db_options_.info_log,
@@ -921,9 +907,9 @@ Status FlushJob::WriteLevel0Table() {
          job_context_->job_id, Env::IO_HIGH, &table_properties_, write_hint,
          full_history_ts_low, blob_callback_, &num_input_entries,
          &memtable_payload_bytes, &memtable_garbage_bytes);
-      // TODO: Cleanup io_status in BuildTable and table builders
-      assert(!s.ok() || io_s.ok());
-      io_s.PermitUncheckedError();
+      if (!io_s.ok()) {
+        io_status_ = io_s;
+      }
      if (num_input_entries != total_num_entries && s.ok()) {
        std::string msg = "Expected " + ToString(total_num_entries) +
                          " entries in memtables, but read " +
@@ -93,6 +93,9 @@ class FlushJob {
  }
 #endif  // !ROCKSDB_LITE

+  // Return the IO status
+  IOStatus io_status() const { return io_status_; }
+
 private:
  void ReportStartedFlush();
  void ReportFlushInputSize(const autovector<MemTable*>& mems);
@@ -181,6 +184,7 @@ class FlushJob {
  Version* base_;
  bool pick_memtable_called;
  Env::Priority thread_pri_;
+  IOStatus io_status_;

  const std::shared_ptr<IOTracer> io_tracer_;
  SystemClock* clock_;
@@ -1,91 +0,0 @@
-// Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
-//  This source code is licensed under both the GPLv2 (found in the
-//  COPYING file in the root directory) and Apache 2.0 License
-//  (found in the LICENSE.Apache file in the root directory).
-#pragma once
-
-#include <string>
-#include <vector>
-
-#include "db/dbformat.h"
-#include "rocksdb/iterator.h"
-#include "rocksdb/slice.h"
-#include "table/internal_iterator.h"
-
-namespace ROCKSDB_NAMESPACE {
-
-class HistoryTrimmingIterator : public InternalIterator {
- public:
-  explicit HistoryTrimmingIterator(InternalIterator* input,
-                                   const Comparator* cmp, const std::string& ts)
-      : input_(input), filter_ts_(ts), cmp_(cmp) {
-    assert(cmp_->timestamp_size() > 0 && !ts.empty());
-  }
-
-  bool filter() const {
-    if (!input_->Valid()) {
-      return true;
-    }
-    Slice current_ts = ExtractTimestampFromKey(key(), cmp_->timestamp_size());
-    return cmp_->CompareTimestamp(current_ts, Slice(filter_ts_)) <= 0;
-  }
-
-  bool Valid() const override { return input_->Valid(); }
-
-  void SeekToFirst() override {
-    input_->SeekToFirst();
-    while (!filter()) {
-      input_->Next();
-    }
-  }
-
-  void SeekToLast() override {
-    input_->SeekToLast();
-    while (!filter()) {
-      input_->Prev();
-    }
-  }
-
-  void Seek(const Slice& target) override {
-    input_->Seek(target);
-    while (!filter()) {
-      input_->Next();
-    }
-  }
-
-  void SeekForPrev(const Slice& target) override {
-    input_->SeekForPrev(target);
-    while (!filter()) {
-      input_->Prev();
-    }
-  }
-
-  void Next() override {
-    do {
-      input_->Next();
-    } while (!filter());
-  }
-
-  void Prev() override {
-    do {
-      input_->Prev();
-    } while (!filter());
-  }
-
-  Slice key() const override { return input_->key(); }
-
-  Slice value() const override { return input_->value(); }
-
-  Status status() const override { return input_->status(); }
-
-  bool IsKeyPinned() const override { return input_->IsKeyPinned(); }
-
-  bool IsValuePinned() const override { return input_->IsValuePinned(); }
-
- private:
-  InternalIterator* input_;
-  const std::string filter_ts_;
-  const Comparator* const cmp_;
-};
-
-}  // namespace ROCKSDB_NAMESPACE
@@ -519,7 +519,7 @@ const std::unordered_map<std::string, DBPropertyInfo>
         {false, nullptr, &InternalStats::HandleLiveSstFilesSize, nullptr,
          nullptr}},
        {DB::Properties::kLiveSstFilesSizeAtTemperature,
-         {false, &InternalStats::HandleLiveSstFilesSizeAtTemperature, nullptr,
+         {true, &InternalStats::HandleLiveSstFilesSizeAtTemperature, nullptr,
          nullptr, nullptr}},
        {DB::Properties::kEstimatePendingCompactionBytes,
         {false, nullptr, &InternalStats::HandleEstimatePendingCompactionBytes,
@@ -37,16 +37,13 @@ struct SuperVersionContext {
  explicit SuperVersionContext(bool create_superversion = false)
    : new_superversion(create_superversion ? new SuperVersion() : nullptr) {}

-  explicit SuperVersionContext(SuperVersionContext&& other) noexcept
+  explicit SuperVersionContext(SuperVersionContext&& other)
      : superversions_to_free(std::move(other.superversions_to_free)),
 #ifndef ROCKSDB_DISABLE_STALL_NOTIFICATION
        write_stall_notifications(std::move(other.write_stall_notifications)),
 #endif
        new_superversion(std::move(other.new_superversion)) {
  }
-  // No copies
-  SuperVersionContext(const SuperVersionContext& other) = delete;
-  void operator=(const SuperVersionContext& other) = delete;

  void NewSuperVersion() {
    new_superversion = std::unique_ptr<SuperVersion>(new SuperVersion());
@@ -340,9 +340,6 @@ TEST_F(EventListenerTest, OnSingleDBFlushTest) {
  for (int i = 1; i < 8; ++i) {
    ASSERT_OK(Flush(i));
    ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable());
-    // Ensure background work is fully finished including listener callbacks
-    // before accessing listener state.
-    ASSERT_OK(dbfull()->TEST_WaitForBackgroundWork());
    ASSERT_EQ(listener->flushed_dbs_.size(), i);
    ASSERT_EQ(listener->flushed_column_family_names_.size(), i);
  }
@@ -465,13 +462,6 @@ TEST_F(EventListenerTest, MultiDBMultiListeners) {
    }
  }

-  for (int d = 0; d < kNumDBs; ++d) {
-    // Ensure background work is fully finished including listener callbacks
-    // before accessing listener state.
-    ASSERT_OK(
-        static_cast_with_check<DBImpl>(dbs[d])->TEST_WaitForBackgroundWork());
-  }
-
  for (auto* listener : listeners) {
    int pos = 0;
    for (size_t c = 0; c < cf_names.size(); ++c) {
@@ -533,10 +523,10 @@ TEST_F(EventListenerTest, DisableBGCompaction) {
    ASSERT_OK(db_->Flush(fo, handles_[1]));
    db_->GetColumnFamilyMetaData(handles_[1], &cf_meta);
  }
-  // Ensure background work is fully finished including listener callbacks
-  // before accessing listener state.
-  ASSERT_OK(dbfull()->TEST_WaitForBackgroundWork());
  ASSERT_GE(listener->slowdown_count, kSlowdownTrigger * 9);
+  // We don't want the listener executing during DBTestBase::Close() due to
+  // race on handles_.
+  ASSERT_OK(dbfull()->TEST_WaitForBackgroundWork());
 }

 class TestCompactionReasonListener : public EventListener {
@@ -10,7 +10,6 @@
 #include "db/log_reader.h"

 #include <stdio.h>
-
 #include "file/sequence_file_reader.h"
 #include "port/lang.h"
 #include "rocksdb/env.h"
@@ -42,14 +41,10 @@ Reader::Reader(std::shared_ptr<Logger> info_log,
      recycled_(false),
      first_record_read_(false),
      compression_type_(kNoCompression),
-      compression_type_record_read_(false),
-      uncompress_(nullptr) {}
+      compression_type_record_read_(false) {}

 Reader::~Reader() {
  delete[] backing_store_;
-  if (uncompress_) {
-    delete uncompress_;
-  }
 }

 // For kAbsoluteConsistency, on clean shutdown we don't expect any error
@@ -63,9 +58,6 @@ bool Reader::ReadRecord(Slice* record, std::string* scratch,
                        WALRecoveryMode wal_recovery_mode) {
  scratch->clear();
  record->clear();
-  if (uncompress_) {
-    uncompress_->Reset();
-  }
  bool in_fragmented_record = false;
  // Record offset of the logical record that we're reading
  // 0 is a dummy value to make compilers happy
@@ -243,7 +235,8 @@ bool Reader::ReadRecord(Slice* record, std::string* scratch,
          ReportCorruption(fragment.size(),
                           "could not decode SetCompressionType record");
        } else {
-          InitCompression(compression_record);
+          compression_type_ = compression_record.GetCompressionType();
+          compression_type_record_read_ = true;
        }
        break;
      }
@@ -457,54 +450,17 @@ unsigned int Reader::ReadPhysicalRecord(Slice* result, size_t* drop_size) {

    buffer_.remove_prefix(header_size + length);

-    if (!uncompress_ || type == kSetCompressionType) {
-      *result = Slice(header + header_size, length);
-      return type;
-    } else {
-      // Uncompress compressed records
-      uncompressed_record_.clear();
-      size_t uncompressed_size = 0;
-      int remaining = 0;
-      do {
-        remaining = uncompress_->Uncompress(header + header_size, length,
-                                            uncompressed_buffer_.get(),
-                                            &uncompressed_size);
-        if (remaining < 0) {
-          buffer_.clear();
-          return kBadRecord;
-        }
-        if (uncompressed_size > 0) {
-          uncompressed_record_.append(uncompressed_buffer_.get(),
-                                      uncompressed_size);
-        }
-      } while (remaining > 0 || uncompressed_size == kBlockSize);
-      *result = Slice(uncompressed_record_);
-      return type;
-    }
+    *result = Slice(header + header_size, length);
+    return type;
  }
 }

-// Initialize uncompress related fields
-void Reader::InitCompression(const CompressionTypeRecord& compression_record) {
-  compression_type_ = compression_record.GetCompressionType();
-  compression_type_record_read_ = true;
-  constexpr uint32_t compression_format_version = 2;
-  uncompress_ = StreamingUncompress::Create(
-      compression_type_, compression_format_version, kBlockSize);
-  assert(uncompress_ != nullptr);
-  uncompressed_buffer_ = std::unique_ptr<char[]>(new char[kBlockSize]);
-  assert(uncompressed_buffer_);
-}
-
 bool FragmentBufferedReader::ReadRecord(Slice* record, std::string* scratch,
                                        WALRecoveryMode /*unused*/) {
  assert(record != nullptr);
  assert(scratch != nullptr);
  record->clear();
  scratch->clear();
-  if (uncompress_) {
-    uncompress_->Reset();
-  }

  uint64_t prospective_record_offset = 0;
  uint64_t physical_record_offset = end_of_buffer_offset_ - buffer_.size();
@@ -606,7 +562,7 @@ bool FragmentBufferedReader::ReadRecord(Slice* record, std::string* scratch,
          ReportCorruption(fragment.size(),
                           "could not decode SetCompressionType record");
        } else {
-          InitCompression(compression_record);
+          compression_type_ = compression_record.GetCompressionType();
        }
        break;
      }
@@ -744,33 +700,9 @@ bool FragmentBufferedReader::TryReadFragment(

  buffer_.remove_prefix(header_size + length);

-  if (!uncompress_ || type == kSetCompressionType) {
-    *fragment = Slice(header + header_size, length);
-    *fragment_type_or_err = type;
-    return true;
-  } else {
-    // Uncompress compressed records
-    uncompressed_record_.clear();
-    size_t uncompressed_size = 0;
-    int remaining = 0;
-    do {
-      remaining = uncompress_->Uncompress(header + header_size, length,
-                                          uncompressed_buffer_.get(),
-                                          &uncompressed_size);
-      if (remaining < 0) {
-        buffer_.clear();
-        *fragment_type_or_err = kBadRecord;
-        return true;
-      }
-      if (uncompressed_size > 0) {
-        uncompressed_record_.append(uncompressed_buffer_.get(),
-                                    uncompressed_size);
-      }
-    } while (remaining > 0 || uncompressed_size == kBlockSize);
-    *fragment = Slice(std::move(uncompressed_record_));
-    *fragment_type_or_err = type;
-    return true;
-  }
+  *fragment = Slice(header + header_size, length);
+  *fragment_type_or_err = type;
+  return true;
 }

 }  // namespace log
@@ -136,11 +136,6 @@ class Reader {
  CompressionType compression_type_;
  // Track whether the compression type record has been read or not.
  bool compression_type_record_read_;
-  StreamingUncompress* uncompress_;
-  // Reusable uncompressed output buffer
-  std::unique_ptr<char[]> uncompressed_buffer_;
-  // Reusable uncompressed record
-  std::string uncompressed_record_;

  // Extend record types with the following special values
  enum {
@@ -172,8 +167,6 @@ class Reader {
  // buffer_ must be updated to remove the dropped bytes prior to invocation.
  void ReportCorruption(size_t bytes, const char* reason);
  void ReportDrop(size_t bytes, const Status& reason);
-
-  void InitCompression(const CompressionTypeRecord& compression_record);
 };

 class FragmentBufferedReader : public Reader {
@@ -17,7 +17,6 @@
 #include "util/coding.h"
 #include "util/crc32c.h"
 #include "util/random.h"
-#include "utilities/memory_allocators.h"

 namespace ROCKSDB_NAMESPACE {
 namespace log {
@@ -904,11 +903,6 @@ class CompressionLogTest : public LogTest {
 };

 TEST_P(CompressionLogTest, Empty) {
-  CompressionType compression_type = std::get<2>(GetParam());
-  if (!StreamingCompressionTypeSupported(compression_type)) {
-    ROCKSDB_GTEST_SKIP("Test requires support for compression type");
-    return;
-  }
  ASSERT_OK(SetupTestEnv());
  const bool compression_enabled =
      std::get<2>(GetParam()) == kNoCompression ? false : true;
@@ -918,130 +912,12 @@ TEST_P(CompressionLogTest, Empty) {
  ASSERT_EQ("EOF", Read());
 }

-TEST_P(CompressionLogTest, ReadWrite) {
-  CompressionType compression_type = std::get<2>(GetParam());
-  if (!StreamingCompressionTypeSupported(compression_type)) {
-    ROCKSDB_GTEST_SKIP("Test requires support for compression type");
-    return;
-  }
-  ASSERT_OK(SetupTestEnv());
-  Write("foo");
-  Write("bar");
-  Write("");
-  Write("xxxx");
-  ASSERT_EQ("foo", Read());
-  ASSERT_EQ("bar", Read());
-  ASSERT_EQ("", Read());
-  ASSERT_EQ("xxxx", Read());
-  ASSERT_EQ("EOF", Read());
-  ASSERT_EQ("EOF", Read());  // Make sure reads at eof work
-}
-
-TEST_P(CompressionLogTest, ManyBlocks) {
-  CompressionType compression_type = std::get<2>(GetParam());
-  if (!StreamingCompressionTypeSupported(compression_type)) {
-    ROCKSDB_GTEST_SKIP("Test requires support for compression type");
-    return;
-  }
-  ASSERT_OK(SetupTestEnv());
-  for (int i = 0; i < 100000; i++) {
-    Write(NumberString(i));
-  }
-  for (int i = 0; i < 100000; i++) {
-    ASSERT_EQ(NumberString(i), Read());
-  }
-  ASSERT_EQ("EOF", Read());
-}
-
-TEST_P(CompressionLogTest, Fragmentation) {
-  CompressionType compression_type = std::get<2>(GetParam());
-  if (!StreamingCompressionTypeSupported(compression_type)) {
-    ROCKSDB_GTEST_SKIP("Test requires support for compression type");
-    return;
-  }
-  ASSERT_OK(SetupTestEnv());
-  Write("small");
-  Write(BigString("medium", 50000));
-  Write(BigString("large", 100000));
-  ASSERT_EQ("small", Read());
-  ASSERT_EQ(BigString("medium", 50000), Read());
-  ASSERT_EQ(BigString("large", 100000), Read());
-  ASSERT_EQ("EOF", Read());
-}
-
 INSTANTIATE_TEST_CASE_P(
    Compression, CompressionLogTest,
    ::testing::Combine(::testing::Values(0, 1), ::testing::Bool(),
                       ::testing::Values(CompressionType::kNoCompression,
                                         CompressionType::kZSTD)));

-class StreamingCompressionTest
-    : public ::testing::TestWithParam<std::tuple<int, CompressionType>> {};
-
-TEST_P(StreamingCompressionTest, Basic) {
-  size_t input_size = std::get<0>(GetParam());
-  CompressionType compression_type = std::get<1>(GetParam());
-  if (!StreamingCompressionTypeSupported(compression_type)) {
-    ROCKSDB_GTEST_SKIP("Test requires support for compression type");
-    return;
-  }
-  CompressionOptions opts;
-  constexpr uint32_t compression_format_version = 2;
-  StreamingCompress* compress = StreamingCompress::Create(
-      compression_type, opts, compression_format_version, kBlockSize);
-  StreamingUncompress* uncompress = StreamingUncompress::Create(
-      compression_type, compression_format_version, kBlockSize);
-  MemoryAllocator* allocator = new DefaultMemoryAllocator();
-  std::string input_buffer = BigString("abc", input_size);
-  std::vector<std::string> compressed_buffers;
-  size_t remaining;
-  // Call compress till the entire input is consumed
-  do {
-    char* output_buffer = (char*)allocator->Allocate(kBlockSize);
-    size_t output_pos;
-    remaining = compress->Compress(input_buffer.c_str(), input_size,
-                                   output_buffer, &output_pos);
-    if (output_pos > 0) {
-      std::string compressed_buffer;
-      compressed_buffer.assign(output_buffer, output_pos);
-      compressed_buffers.emplace_back(std::move(compressed_buffer));
-    }
-    allocator->Deallocate((void*)output_buffer);
-  } while (remaining > 0);
-  std::string uncompressed_buffer = "";
-  int ret_val = 0;
-  size_t output_pos;
-  char* uncompressed_output_buffer = (char*)allocator->Allocate(kBlockSize);
-  // Uncompress the fragments and concatenate them.
-  for (int i = 0; i < (int)compressed_buffers.size(); i++) {
-    // Call uncompress till either the entire input is consumed or the output
-    // buffer size is equal to the allocated output buffer size.
-    do {
-      ret_val = uncompress->Uncompress(compressed_buffers[i].c_str(),
-                                       compressed_buffers[i].size(),
-                                       uncompressed_output_buffer, &output_pos);
-      if (output_pos > 0) {
-        std::string uncompressed_fragment;
-        uncompressed_fragment.assign(uncompressed_output_buffer, output_pos);
-        uncompressed_buffer += uncompressed_fragment;
-      }
-    } while (ret_val > 0 || output_pos == kBlockSize);
-  }
-  allocator->Deallocate((void*)uncompressed_output_buffer);
-  delete allocator;
-  delete compress;
-  delete uncompress;
-  // The final return value from uncompress() should be 0.
-  ASSERT_EQ(ret_val, 0);
-  ASSERT_EQ(input_buffer, uncompressed_buffer);
-}
-
-INSTANTIATE_TEST_CASE_P(
-    StreamingCompression, StreamingCompressionTest,
-    ::testing::Combine(::testing::Values(10, 100, 1000, kBlockSize,
-                                         kBlockSize * 2),
-                       ::testing::Values(CompressionType::kZSTD)));
-
 }  // namespace log
 }  // namespace ROCKSDB_NAMESPACE

@@ -10,7 +10,6 @@
 #include "db/log_writer.h"

 #include <stdint.h>
-
 #include "file/writable_file_writer.h"
 #include "rocksdb/env.h"
 #include "util/coding.h"
@@ -27,8 +26,7 @@ Writer::Writer(std::unique_ptr<WritableFileWriter>&& dest, uint64_t log_number,
      log_number_(log_number),
      recycle_log_files_(recycle_log_files),
      manual_flush_(manual_flush),
-      compression_type_(compression_type),
-      compress_(nullptr) {
+      compression_type_(compression_type) {
  for (int i = 0; i <= kMaxRecordType; i++) {
    char t = static_cast<char>(i);
    type_crc_[i] = crc32c::Value(&t, 1);
@@ -39,9 +37,6 @@ Writer::~Writer() {
  if (dest_) {
    WriteBuffer().PermitUncheckedError();
  }
-  if (compress_) {
-    delete compress_;
-  }
 }

 IOStatus Writer::WriteBuffer() { return dest_->Flush(); }
@@ -55,8 +50,7 @@ IOStatus Writer::Close() {
  return s;
 }

-IOStatus Writer::AddRecord(const Slice& slice,
-                           Env::IOPriority rate_limiter_priority) {
+IOStatus Writer::AddRecord(const Slice& slice) {
  const char* ptr = slice.data();
  size_t left = slice.size();

@@ -69,12 +63,6 @@ IOStatus Writer::AddRecord(const Slice& slice,
  // zero-length record
  IOStatus s;
  bool begin = true;
-  int compress_remaining = 0;
-  bool compress_start = false;
-  if (compress_) {
-    compress_->Reset();
-    compress_start = true;
-  }
  do {
    const int64_t leftover = kBlockSize - block_offset_;
    assert(leftover >= 0);
@@ -85,8 +73,7 @@ IOStatus Writer::AddRecord(const Slice& slice,
        // kRecyclableHeaderSize being <= 11)
        assert(header_size <= 11);
        s = dest_->Append(Slice("\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
-                                static_cast<size_t>(leftover)),
-                          0 /* crc32c_checksum */, rate_limiter_priority);
+                                static_cast<size_t>(leftover)));
        if (!s.ok()) {
          break;
        }
@@ -98,34 +85,10 @@ IOStatus Writer::AddRecord(const Slice& slice,
    assert(static_cast<int64_t>(kBlockSize - block_offset_) >= header_size);

    const size_t avail = kBlockSize - block_offset_ - header_size;
-
-    // Compress the record if compression is enabled.
-    // Compress() is called at least once (compress_start=true) and after the
-    // previous generated compressed chunk is written out as one or more
-    // physical records (left=0).
-    if (compress_ && (compress_start || left == 0)) {
-      compress_remaining = compress_->Compress(slice.data(), slice.size(),
-                                               compressed_buffer_.get(), &left);
-
-      if (compress_remaining < 0) {
-        // Set failure status
-        s = IOStatus::IOError("Unexpected WAL compression error");
-        s.SetDataLoss(true);
-        break;
-      } else if (left == 0) {
-        // Nothing left to compress
-        if (!compress_start) {
-          break;
-        }
-      }
-      compress_start = false;
-      ptr = compressed_buffer_.get();
-    }
-
    const size_t fragment_length = (left < avail) ? left : avail;

    RecordType type;
-    const bool end = (left == fragment_length && compress_remaining == 0);
+    const bool end = (left == fragment_length);
    if (begin && end) {
      type = recycle_log_files_ ? kRecyclableFullType : kFullType;
    } else if (begin) {
@@ -136,15 +99,15 @@ IOStatus Writer::AddRecord(const Slice& slice,
      type = recycle_log_files_ ? kRecyclableMiddleType : kMiddleType;
    }

-    s = EmitPhysicalRecord(type, ptr, fragment_length, rate_limiter_priority);
+    s = EmitPhysicalRecord(type, ptr, fragment_length);
    ptr += fragment_length;
    left -= fragment_length;
    begin = false;
-  } while (s.ok() && (left > 0 || compress_remaining > 0));
+  } while (s.ok() && left > 0);

  if (s.ok()) {
    if (!manual_flush_) {
-      s = dest_->Flush(rate_limiter_priority);
+      s = dest_->Flush();
    }
  }

@@ -169,18 +132,6 @@ IOStatus Writer::AddCompressionTypeRecord() {
    if (!manual_flush_) {
      s = dest_->Flush();
    }
-    // Initialize fields required for compression
-    const size_t max_output_buffer_len =
-        kBlockSize - (recycle_log_files_ ? kRecyclableHeaderSize : kHeaderSize);
-    CompressionOptions opts;
-    constexpr uint32_t compression_format_version = 2;
-    compress_ = StreamingCompress::Create(compression_type_, opts,
-                                          compression_format_version,
-                                          max_output_buffer_len);
-    assert(compress_ != nullptr);
-    compressed_buffer_ =
-        std::unique_ptr<char[]>(new char[max_output_buffer_len]);
-    assert(compressed_buffer_);
  } else {
    // Disable compression if the record could not be added.
    compression_type_ = kNoCompression;
@@ -190,8 +141,7 @@ IOStatus Writer::AddCompressionTypeRecord() {

 bool Writer::TEST_BufferIsEmpty() { return dest_->TEST_BufferIsEmpty(); }

-IOStatus Writer::EmitPhysicalRecord(RecordType t, const char* ptr, size_t n,
-                                    Env::IOPriority rate_limiter_priority) {
+IOStatus Writer::EmitPhysicalRecord(RecordType t, const char* ptr, size_t n) {
  assert(n <= 0xffff);  // Must fit in two bytes

  size_t header_size;
@@ -230,10 +180,9 @@ IOStatus Writer::EmitPhysicalRecord(RecordType t, const char* ptr, size_t n,
  EncodeFixed32(buf, crc);

  // Write the header and the payload
-  IOStatus s = dest_->Append(Slice(buf, header_size), 0 /* crc32c_checksum */,
-                             rate_limiter_priority);
+  IOStatus s = dest_->Append(Slice(buf, header_size));
  if (s.ok()) {
-    s = dest_->Append(Slice(ptr, n), payload_crc, rate_limiter_priority);
+    s = dest_->Append(Slice(ptr, n), payload_crc);
  }
  block_offset_ += header_size + n;
  return s;
@@ -13,11 +13,9 @@

 #include "db/log_format.h"
 #include "rocksdb/compression_type.h"
-#include "rocksdb/env.h"
 #include "rocksdb/io_status.h"
 #include "rocksdb/slice.h"
 #include "rocksdb/status.h"
-#include "util/compression.h"

 namespace ROCKSDB_NAMESPACE {

@@ -83,8 +81,7 @@ class Writer {

  ~Writer();

-  IOStatus AddRecord(const Slice& slice,
-                     Env::IOPriority rate_limiter_priority = Env::IO_TOTAL);
+  IOStatus AddRecord(const Slice& slice);
  IOStatus AddCompressionTypeRecord();

  WritableFileWriter* file() { return dest_.get(); }
@@ -109,9 +106,7 @@ class Writer {
  // record type stored in the header.
  uint32_t type_crc_[kMaxRecordType + 1];

-  IOStatus EmitPhysicalRecord(
-      RecordType type, const char* ptr, size_t length,
-      Env::IOPriority rate_limiter_priority = Env::IO_TOTAL);
+  IOStatus EmitPhysicalRecord(RecordType type, const char* ptr, size_t length);

  // If true, it does not flush after each write. Instead it relies on the upper
  // layer to manually does the flush by calling ::WriteBuffer()
@@ -119,9 +114,6 @@ class Writer {

  // Compression Type
  CompressionType compression_type_;
-  StreamingCompress* compress_;
-  // Reusable compressed output buffer
-  std::unique_ptr<char[]> compressed_buffer_;
 };

 }  // namespace log
@@ -338,8 +338,7 @@ bool MemTableList::IsFlushPending() const {

 // Returns the memtables that need to be flushed.
 void MemTableList::PickMemtablesToFlush(uint64_t max_memtable_id,
-                                        autovector<MemTable*>* ret,
-                                        uint64_t* max_next_log_number) {
+                                        autovector<MemTable*>* ret) {
  AutoThreadOperationStageUpdater stage_updater(
      ThreadStatus::STAGE_PICK_MEMTABLES_TO_FLUSH);
  const auto& memlist = current_->memlist_;
@@ -350,7 +349,8 @@ void MemTableList::PickMemtablesToFlush(uint64_t max_memtable_id,
  // iterating through the memlist starting at the end, the vector<MemTable*>
  // ret is filled with memtables already sorted in increasing MemTable ID.
  // However, when the mempurge feature is activated, new memtables with older
-  // IDs will be added to the memlist.
+  // IDs will be added to the memlist. Therefore we std::sort(ret) at the end to
+  // return a vector of memtables sorted by increasing memtable ID.
  for (auto it = memlist.rbegin(); it != memlist.rend(); ++it) {
    MemTable* m = *it;
    if (!atomic_flush && m->atomic_flush_seqno_ != kMaxSequenceNumber) {
@@ -366,16 +366,21 @@ void MemTableList::PickMemtablesToFlush(uint64_t max_memtable_id,
        imm_flush_needed.store(false, std::memory_order_release);
      }
      m->flush_in_progress_ = true;  // flushing will start very soon
-      if (max_next_log_number) {
-        *max_next_log_number =
-            std::max(m->GetNextLogNumber(), *max_next_log_number);
-      }
      ret->push_back(m);
    }
  }
  if (!atomic_flush || num_flush_not_started_ == 0) {
    flush_requested_ = false;  // start-flush request is complete
  }
+
+  // Sort the list of memtables by increasing memtable ID.
+  // This is useful when the mempurge feature is activated
+  // and the memtables are not guaranteed to be sorted in
+  // the memlist vector.
+  std::sort(ret->begin(), ret->end(),
+            [](const MemTable* m1, const MemTable* m2) -> bool {
+              return m1->GetID() < m2->GetID();
+            });
 }

 void MemTableList::RollbackMemtableFlush(const autovector<MemTable*>& mems,
@@ -407,7 +412,7 @@ Status MemTableList::TryInstallMemtableFlushResults(
    autovector<MemTable*>* to_delete, FSDirectory* db_directory,
    LogBuffer* log_buffer,
    std::list<std::unique_ptr<FlushJobInfo>>* committed_flush_jobs_info,
-    bool write_edits) {
+    IOStatus* io_s, bool write_edits) {
  AutoThreadOperationStageUpdater stage_updater(
      ThreadStatus::STAGE_MEMTABLE_INSTALL_FLUSH_RESULTS);
  mu->AssertHeld();
@@ -505,20 +510,21 @@ Status MemTableList::TryInstallMemtableFlushResults(
        min_wal_number_to_keep =
            PrecomputeMinLogNumberToKeepNon2PC(vset, *cfd, edit_list);
      }
+      edit_list.back()->SetMinLogNumberToKeep(min_wal_number_to_keep);

-      VersionEdit wal_deletion;
-      wal_deletion.SetMinLogNumberToKeep(min_wal_number_to_keep);
+      std::unique_ptr<VersionEdit> wal_deletion;
      if (vset->db_options()->track_and_verify_wals_in_manifest) {
        if (min_wal_number_to_keep >
            vset->GetWalSet().GetMinWalNumberToKeep()) {
-          wal_deletion.DeleteWalsBefore(min_wal_number_to_keep);
+          wal_deletion.reset(new VersionEdit);
+          wal_deletion->DeleteWalsBefore(min_wal_number_to_keep);
+          edit_list.push_back(wal_deletion.get());
        }
        TEST_SYNC_POINT_CALLBACK(
            "MemTableList::TryInstallMemtableFlushResults:"
            "AfterComputeMinWalToKeep",
            nullptr);
      }
-      edit_list.push_back(&wal_deletion);

      const auto manifest_write_cb = [this, cfd, batch_count, log_buffer,
                                      to_delete, mu](const Status& status) {
@@ -531,6 +537,7 @@ Status MemTableList::TryInstallMemtableFlushResults(
                              db_directory, /*new_descriptor_log=*/false,
                              /*column_family_options=*/nullptr,
                              manifest_write_cb);
+        *io_s = vset->io_status();
      } else {
        // If write_edit is false (e.g: successful mempurge),
        // then remove old memtables, wake up manifest write queue threads,
@@ -546,6 +553,7 @@ Status MemTableList::TryInstallMemtableFlushResults(
        // TODO(bjlemaire): explain full reason WakeUpWaitingManifestWriters
        // needed or investigate more.
        vset->WakeUpWaitingManifestWriters();
+        *io_s = IOStatus::OK();
      }
    }
  }
@@ -804,15 +812,17 @@ Status InstallMemtableAtomicFlushResults(
    min_wal_number_to_keep =
        PrecomputeMinLogNumberToKeepNon2PC(vset, cfds, edit_lists);
  }
+  edit_lists.back().back()->SetMinLogNumberToKeep(min_wal_number_to_keep);

-  VersionEdit wal_deletion;
-  wal_deletion.SetMinLogNumberToKeep(min_wal_number_to_keep);
-  if (vset->db_options()->track_and_verify_wals_in_manifest &&
-      min_wal_number_to_keep > vset->GetWalSet().GetMinWalNumberToKeep()) {
-    wal_deletion.DeleteWalsBefore(min_wal_number_to_keep);
+  std::unique_ptr<VersionEdit> wal_deletion;
+  if (vset->db_options()->track_and_verify_wals_in_manifest) {
+    if (min_wal_number_to_keep > vset->GetWalSet().GetMinWalNumberToKeep()) {
+      wal_deletion.reset(new VersionEdit);
+      wal_deletion->DeleteWalsBefore(min_wal_number_to_keep);
+      edit_lists.back().push_back(wal_deletion.get());
+      ++num_entries;
+    }
  }
-  edit_lists.back().push_back(&wal_deletion);
-  ++num_entries;

  // Mark the version edits as an atomic group if the number of version edits
  // exceeds 1.
@@ -253,8 +253,7 @@ class MemTableList {
  // Returns the earliest memtables that needs to be flushed. The returned
  // memtables are guaranteed to be in the ascending order of created time.
  void PickMemtablesToFlush(uint64_t max_memtable_id,
-                            autovector<MemTable*>* mems,
-                            uint64_t* max_next_log_number = nullptr);
+                            autovector<MemTable*>* mems);

  // Reset status of the given memtable list back to pending state so that
  // they can get picked up again on the next round of flush.
@@ -270,7 +269,7 @@ class MemTableList {
      autovector<MemTable*>* to_delete, FSDirectory* db_directory,
      LogBuffer* log_buffer,
      std::list<std::unique_ptr<FlushJobInfo>>* committed_flush_jobs_info,
-      bool write_edits = true);
+      IOStatus* io_s, bool write_edits = true);

  // New memtables are inserted at the front of the list.
  // Takes ownership of the referenced held on *m by the caller of Add().
@@ -124,7 +124,7 @@ class MemTableListTest : public testing::Test {
    std::list<std::unique_ptr<FlushJobInfo>> flush_jobs_info;
    Status s = list->TryInstallMemtableFlushResults(
        cfd, mutable_cf_options, m, &dummy_prep_tracker, &versions, &mutex,
-        file_num, to_delete, nullptr, &log_buffer, &flush_jobs_info);
+        file_num, to_delete, nullptr, &log_buffer, &flush_jobs_info, &io_s);
    EXPECT_OK(io_s);
    return s;
  }
@@ -120,9 +120,6 @@ bool VersionEdit::EncodeTo(std::string* dst) const {
  if (has_max_column_family_) {
    PutVarint32Varint32(dst, kMaxColumnFamily, max_column_family_);
  }
-  if (has_min_log_number_to_keep_) {
-    PutVarint32Varint64(dst, kMinLogNumberToKeep, min_log_number_to_keep_);
-  }
  if (has_last_sequence_) {
    PutVarint32Varint64(dst, kLastSequence, last_sequence_);
  }
@@ -27,7 +27,6 @@
 #include "db/blob/blob_log_format.h"
 #include "db/compaction/compaction.h"
 #include "db/compaction/file_pri.h"
-#include "db/dbformat.h"
 #include "db/internal_stats.h"
 #include "db/log_reader.h"
 #include "db/log_writer.h"
@@ -1476,7 +1475,7 @@ void Version::GetColumnFamilyMetaData(ColumnFamilyMetaData* cf_meta) {
      const uint64_t file_number = file->fd.GetNumber();
      files.emplace_back(
          MakeTableFileName("", file_number), file_number, file_path,
-          file->fd.GetFileSize(), file->fd.smallest_seqno,
+          static_cast<size_t>(file->fd.GetFileSize()), file->fd.smallest_seqno,
          file->fd.largest_seqno, file->smallest.user_key().ToString(),
          file->largest.user_key().ToString(),
          file->stats.num_reads_sampled.load(std::memory_order_relaxed),
@@ -5126,6 +5125,9 @@ Status VersionSet::TryRecoverFromOneManifest(
 Status VersionSet::ListColumnFamilies(std::vector<std::string>* column_families,
                                      const std::string& dbname,
                                      FileSystem* fs) {
+  // these are just for performance reasons, not correctness,
+  // so we're fine using the defaults
+  FileOptions soptions;
  // Read "CURRENT" file, which contains a pointer to the current manifest file
  std::string manifest_path;
  uint64_t manifest_file_number;
@@ -5134,24 +5136,16 @@ Status VersionSet::ListColumnFamilies(std::vector<std::string>* column_families,
  if (!s.ok()) {
    return s;
  }
-  return ListColumnFamiliesFromManifest(manifest_path, fs, column_families);
-}

-Status VersionSet::ListColumnFamiliesFromManifest(
-    const std::string& manifest_path, FileSystem* fs,
-    std::vector<std::string>* column_families) {
  std::unique_ptr<SequentialFileReader> file_reader;
-  Status s;
  {
    std::unique_ptr<FSSequentialFile> file;
-    // these are just for performance reasons, not correctness,
-    // so we're fine using the defaults
-    s = fs->NewSequentialFile(manifest_path, FileOptions(), &file, nullptr);
+    s = fs->NewSequentialFile(manifest_path, soptions, &file, nullptr);
    if (!s.ok()) {
      return s;
-    }
-    file_reader = std::make_unique<SequentialFileReader>(
-        std::move(file), manifest_path, /*io_tracer=*/nullptr);
+  }
+  file_reader.reset(new SequentialFileReader(std::move(file), manifest_path,
+                                             nullptr /*IOTracer*/));
  }

  VersionSet::LogReporter reporter;
@@ -5341,16 +5335,9 @@ Status VersionSet::GetLiveFilesChecksumInfo(FileChecksumList* checksum_list) {

 Status VersionSet::DumpManifest(Options& options, std::string& dscname,
                                bool verbose, bool hex, bool json) {
-  assert(options.env);
-  std::vector<std::string> column_families;
-  Status s = ListColumnFamiliesFromManifest(
-      dscname, options.env->GetFileSystem().get(), &column_families);
-  if (!s.ok()) {
-    return s;
-  }
-
  // Open the specified manifest file.
  std::unique_ptr<SequentialFileReader> file_reader;
+  Status s;
  {
    std::unique_ptr<FSSequentialFile> file;
    const std::shared_ptr<FileSystem>& fs = options.env->GetFileSystem();
@@ -5361,16 +5348,14 @@ Status VersionSet::DumpManifest(Options& options, std::string& dscname,
    if (!s.ok()) {
      return s;
    }
-    file_reader = std::make_unique<SequentialFileReader>(
-        std::move(file), dscname, db_options_->log_readahead_size, io_tracer_);
+    file_reader.reset(new SequentialFileReader(
+        std::move(file), dscname, db_options_->log_readahead_size, io_tracer_));
  }

-  std::vector<ColumnFamilyDescriptor> cf_descs;
-  for (const auto& cf : column_families) {
-    cf_descs.emplace_back(cf, options);
-  }
-
-  DumpManifestHandler handler(cf_descs, this, io_tracer_, verbose, hex, json);
+  std::vector<ColumnFamilyDescriptor> column_families(
+      1, ColumnFamilyDescriptor(kDefaultColumnFamilyName, options));
+  DumpManifestHandler handler(column_families, this, io_tracer_, verbose, hex,
+                              json);
  {
    VersionSet::LogReporter reporter;
    reporter.status = &s;
@@ -5817,9 +5802,7 @@ void VersionSet::AddLiveFiles(std::vector<uint64_t>* live_table_files,
 InternalIterator* VersionSet::MakeInputIterator(
    const ReadOptions& read_options, const Compaction* c,
    RangeDelAggregator* range_del_agg,
-    const FileOptions& file_options_compactions,
-    const std::optional<const Slice>& start,
-    const std::optional<const Slice>& end) {
+    const FileOptions& file_options_compactions) {
  auto cfd = c->column_family_data();
  // Level-0 files have to be merged together.  For other levels,
  // we will make a concatenating iterator per level.
@@ -5834,25 +5817,10 @@ InternalIterator* VersionSet::MakeInputIterator(
      if (c->level(which) == 0) {
        const LevelFilesBrief* flevel = c->input_levels(which);
        for (size_t i = 0; i < flevel->num_files; i++) {
-          const FileMetaData& fmd = *flevel->files[i].file_metadata;
-          if (start.has_value() &&
-              cfd->user_comparator()->Compare(start.value(),
-                                              fmd.largest.user_key()) > 0) {
-            continue;
-          }
-          // We should be able to filter out the case where the end key
-          // equals to the end boundary, since the end key is exclusive.
-          // We try to be extra safe here.
-          if (end.has_value() &&
-              cfd->user_comparator()->Compare(end.value(),
-                                              fmd.smallest.user_key()) < 0) {
-            continue;
-          }
-
          list[num++] = cfd->table_cache()->NewIterator(
              read_options, file_options_compactions,
-              cfd->internal_comparator(), fmd, range_del_agg,
-              c->mutable_cf_options()->prefix_extractor,
+              cfd->internal_comparator(), *flevel->files[i].file_metadata,
+              range_del_agg, c->mutable_cf_options()->prefix_extractor,
              /*table_reader_ptr=*/nullptr,
              /*file_read_hist=*/nullptr, TableReaderCaller::kCompaction,
              /*arena=*/nullptr,
@@ -5925,13 +5893,11 @@ void VersionSet::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
          assert(!cfd->ioptions()->cf_paths.empty());
          filemetadata.db_path = cfd->ioptions()->cf_paths.back().path;
        }
-        filemetadata.directory = filemetadata.db_path;
        const uint64_t file_number = file->fd.GetNumber();
        filemetadata.name = MakeTableFileName("", file_number);
-        filemetadata.relative_filename = filemetadata.name.substr(1);
        filemetadata.file_number = file_number;
        filemetadata.level = level;
-        filemetadata.size = file->fd.GetFileSize();
+        filemetadata.size = static_cast<size_t>(file->fd.GetFileSize());
        filemetadata.smallestkey = file->smallest.user_key().ToString();
        filemetadata.largestkey = file->largest.user_key().ToString();
        filemetadata.smallest_seqno = file->fd.smallest_seqno;
@@ -24,7 +24,6 @@
 #include <limits>
 #include <map>
 #include <memory>
-#include <optional>
 #include <set>
 #include <string>
 #include <unordered_set>
@@ -1091,9 +1090,6 @@ class VersionSet {
  // column_families.
  static Status ListColumnFamilies(std::vector<std::string>* column_families,
                                   const std::string& dbname, FileSystem* fs);
-  static Status ListColumnFamiliesFromManifest(
-      const std::string& manifest_path, FileSystem* fs,
-      std::vector<std::string>* column_families);

 #ifndef ROCKSDB_LITE
  // Try to reduce the number of levels. This call is valid when
@@ -1262,13 +1258,10 @@ class VersionSet {
  // Create an iterator that reads over the compaction inputs for "*c".
  // The caller should delete the iterator when no longer needed.
  // @param read_options Must outlive the returned iterator.
-  // @param start, end indicates compaction range
  InternalIterator* MakeInputIterator(
      const ReadOptions& read_options, const Compaction* c,
      RangeDelAggregator* range_del_agg,
-      const FileOptions& file_options_compactions,
-      const std::optional<const Slice>& start,
-      const std::optional<const Slice>& end);
+      const FileOptions& file_options_compactions);

  // Add all files listed in any live version to *live_table_files and
  // *live_blob_files. Note that these lists may contain duplicates.