ceph/src/rocksdb/docs/_posts/2017-06-29-rocksdb-5-5-1-released.markdown

   1 ---
   2 title: RocksDB 5.5.1 Released!
   3 layout: post
   4 author: lightmark
   5 category: blog
   6 ---
   7
   8 ### New Features
   9 * FIFO compaction to support Intra L0 compaction too with CompactionOptionsFIFO.allow_compaction=true.
  10 * Statistics::Reset() to reset user stats.
  11 * ldb add option --try_load_options, which will open DB with its own option file.
  12 * Introduce WriteBatch::PopSavePoint to pop the most recent save point explicitly.
  13 * Support dynamically change `max_open_files` option via SetDBOptions()
  14 * Added DB::CreateColumnFamilie() and DB::DropColumnFamilies() to bulk create/drop column families.
  15 * Add debugging function `GetAllKeyVersions` to see internal versions of a range of keys.
  16 * Support file ingestion with universal compaction style
  17 * Support file ingestion behind with option `allow_ingest_behind`
  18 * New option enable_pipelined_write which may improve write throughput in case writing from multiple threads and WAL enabled.
  19
  20 ### Bug Fixes
  21 * Fix the bug that Direct I/O uses direct reads for non-SST file
  22 * Fix the bug that flush doesn't respond to fsync result