RocksDB 6.5.2 release, kv storage system

RocksDB 6.5.2 is now available. RocksDB is an embeddable support from Facebook persistent key-value storage system may be stored as a database in the C / S Mode. RocksDB based LevelDB building. This version updates are as follows:

Bug fixes

• Repair when BlockBasedTableOptions :: no_block_cache is true and there is no compressed block cache, MultiGe4t assert () failed in
• When the repair is not configured to enable compression compressed block cache, BlockBasedTable :: MultiGet buffer () overflow problem.
• Previously, if a call to BackupEngine :: PurgeOldBackups or BackupEngine :: DeleteBackup crash, power failure or I / O error occurs, the file may be left over from the old backup can only be cleared by calling GarbageCollect. Now, the pair PurgeOldBackups, DeleteBackup or any calls GarbageCollect are sufficient to remove such files.

Update Description: https://github.com/facebook/rocksdb/releases/tag/v6.5.2