RocksDB 5.5.2

Re-tagging 5.5.1 release. No changes from 5.5.1.

RocksDB 5.5.1

New Features

• FIFO compaction to support Intra L0 compaction too with CompactionOptionsFIFO.allow_compaction=true.
• DB::ResetStats() to reset internal stats.
• Statistics::Reset() to reset user stats.
• ldb add option --try_load_options, which will open DB with its own option file.
• Introduce WriteBatch::PopSavePoint to pop the most recent save point explicitly.
• Support dynamically change max_open_files option via SetDBOptions()
• Added DB::CreateColumnFamilie() and DB::DropColumnFamilies() to bulk create/drop column families.
• Add debugging function GetAllKeyVersions to see internal versions of a range of keys.
• Support file ingestion with universal compaction style
• Support file ingestion behind with option allow_ingest_behind
• New option enable_pipelined_write which may improve write throughput in case writing from multiple threads and WAL enabled.

Bug Fixes

• Fix the bug that Direct I/O uses direct reads for non-SST file

v5.4.7

5.4.7 release.

RocksDB 5.4.7

Bug Fixes

• Shouldn't ignore return value of fsync() in flush.

v5.4.6

5.4.6 release.

RocksDB 5.4.6

Bug Fixes

• Fix db_bench with lite build.

v5.4.5

5.4.5 release.

RocksDB 5.4.5

Public API Change

• Support dynamically changing stats_dump_period_sec option via SetDBOptions().
• Added ReadOptions::max_skippable_internal_keys to set a threshold to fail a request as incomplete when too many keys are being skipped while using iterators.
• DB::Get in place of std::string accepts PinnableSlice, which avoids the extra memcpy of value to std::string in most of cases.
  • PinnableSlice releases the pinned resources that contain the value when it is destructed or when ::Reset() is called on it.
  • The old API that accepts std::string, although discouraged, is still supported.
• Replace Options::use_direct_writes with Options::use_direct_io_for_flush_and_compaction. See Direct IO wiki for details.

New Features

• Memtable flush can be avoided during checkpoint creation if total log file size is smaller than a threshold specified by the user.
• Introduce level-based L0->L0 compactions to reduce file count, so write delays are incurred less often.
• (Experimental) Partitioning filters which creates an index on the partitions. The feature can be enabled by setting partition_filters when using kFullFilter. Currently the feature also requires two-level indexing to be enabled. Number of partitions is the same as the number of partitions for indexes, which is controlled by metadata_block_size.
• DB::ResetStats() to reset internal stats.
• Added CompactionEventListener and EventListener::OnFlushBegin interfaces.
• Added DB::CreateColumnFamilie() and DB::DropColumnFamilies() to bulk create/drop column families.
• Facility for cross-building RocksJava using Docker.

Bug Fixes

• Fix WriteBatchWithIndex address use after scope error.
• Fix WritableFile buffer size in direct IO.
• Add prefetch to PosixRandomAccessFile in buffered io.
• Fix PinnableSlice access invalid address when row cache is enabled.
• Fix huge fallocate calls fail and make XFS unhappy.
• Fix memory alignment with logical sector size.
• Fix alignment in ReadaheadRandomAccessFile.
• Fix bias with read amplification stats (READ_AMP_ESTIMATE_USEFUL_BYTES and READ_AMP_TOTAL_READ_BYTES).
• Fix a manual / auto compaction data race.
• Fix CentOS 5 cross-building of RocksJava.
• Build and link with ZStd when creating the static RocksJava build.
• Fix snprintf's usage to be cross-platform.
• Fix build errors with blob DB.
• Fix readamp test type inconsistency.

v5.3.6

• Fix RocksJava static build issue.
• Fix RocksJava build for IBM/PPC.

RocksDB 5.3.6

• Fix RocksJava static build issue.
• Fix RocksJava build for IBM/PPC.