RocksDB 4.13.5
·
6 commits
to 4.13.fb
since this release
We have skipped releasing 4.12.x and went directly to 4.13.5
4.13.5
Public API Change
- Fix a regression in compaction performance.
- Disallow calling IngestExternalFile() on a dropped column family.
- Add EventListener::OnExternalFileIngested() event that will be called for files that are successfully ingested.
4.13.4
Public API Change
- Removed flashcache support.
4.13.0 (10/18/2016)
Public API Change
- DB::GetOptions() reflect dynamic changed options (i.e. through DB::SetOptions()) and return copy of options instead of reference.
- Added Statistics::getAndResetTickerCount().
New Features
- Add DB::SetDBOptions() to dynamic change base_background_compactions and max_background_compactions.
- Added Iterator::SeekForPrev(). This new API will seek to the last key that is less than or equal to the target key.
4.12.0 (9/12/2016)
Public API Change
- CancelAllBackgroundWork() flushes all memtables for databases containing writes that have bypassed the WAL (writes issued with WriteOptions::disableWAL=true) before shutting down background threads.
- Merge options source_compaction_factor, max_grandparent_overlap_bytes and expanded_compaction_factor into max_compaction_bytes.
- Remove ImmutableCFOptions.
- Add a compression type ZSTD, which can work with ZSTD 0.8.0 or up. Still keep ZSTDNotFinal for compatibility reasons.
New Features
- Introduce NewClockCache, which is based on CLOCK algorithm with better concurrent performance in some cases. It can be used to replace the default LRU-based block cache and table cache. To use it, RocksDB need to be linked with TBB lib.
- Change ticker/histogram statistics implementations to accumulate data in thread-local storage, which improves CPU performance by reducing cache coherency costs. Callers of CreateDBStatistics do not need to change anything to use this feature.
- Block cache mid-point insertion, where index and filter block are inserted into LRU block cache with higher priority. The feature can be enabled by setting BlockBasedTableOptions::cache_index_and_filter_blocks_with_high_priority to true and high_pri_pool_ratio > 0 when creating NewLRUCache.