need to seek rocksdb iter to first

src/storage/rocksdb.cpp

@@ -170,8 +170,10 @@ bool RocksDBStorageProvider::enumerate(callback fn) const
 
 size_t RocksDBStorageProvider::stateful_enumerate(callback fn)
 {
-    if (m_iter == nullptr || !m_iter->Valid())
+    if (m_iter == nullptr || !m_iter->Valid()) {
         m_iter = std::unique_ptr<rocksdb::Iterator>(m_spdb->NewIterator(ReadOptions(), m_spcolfamily.get()));
+        m_iter->SeekToFirst();
+    }
     size_t count = 0;
     while (m_iter->Valid()) {
         if (FInternalKey(m_iter->key().data(), m_iter->key().size()))

tests/unit/flash.tcl

@@ -122,15 +122,13 @@ if {$::flash_enabled} {
 
         test { Keys in storage are expired } {
             r flushdb
-            r psetex key1 1000 a
-            r psetex key2 1000 a
-            r psetex key3 1000 a
+            r psetex key1 10000 a
+            r psetex key2 10000 a
+            r psetex key3 10000 a
             r flushall cache
-            # Redis expires random keys ten times every second so we are
-            # fairly sure that all the three keys should be evicted after
-            # one second.
+
             after 1000
-            wait_for_condition 100 50 {
+            wait_for_condition 1000 50 {
                 [r dbsize] == 0
             } else {
                 fail "keys in ssd only not expired"