Release RocksDB 8.1.1 · meta/rocksdb

8.1.1 (2023-04-06)

In the DB::VerifyFileChecksums API, ensure that file system reads of SST files are equal to the readahead_size in ReadOptions, if specified. Previously, each read was 2x the readahead_size.

Compaction output file cutting logic now considers range tombstone start keys. For example, SST partitioner now may receive ParitionRequest for range tombstone start keys.
If the async_io ReadOption is specified for MultiGet or NewIterator on a platform that doesn't support IO uring, the option is ignored and synchronous IO is used.

Fixed an issue for backward iteration when user defined timestamp is enabled in combination with BlobDB.
Fixed a couple of cases where a Merge operand encountered during iteration wasn't reflected in the internal_merge_count PerfContext counter.
Fixed a bug in CreateColumnFamilyWithImport()/ExportColumnFamily() which did not support range tombstones (#11252).
Fixed a bug where an excluded column family from an atomic flush contains unflushed data that should've been included in this atomic flush (i.e, data of seqno less than the max seqno of this atomic flush), leading to potential data loss in this excluded column family when WriteOptions::disableWAL == true (#11148).

Add statistics rocksdb.secondary.cache.filter.hits, rocksdb.secondary.cache.index.hits, and rocksdb.secondary.cache.filter.hits
Added a new PerfContext counter internal_merge_point_lookup_count which tracks the number of Merge operands applied while serving point lookup queries.
Add new statistics rocksdb.table.open.prefetch.tail.read.bytes, rocksdb.table.open.prefetch.tail.{miss|hit}
Add support for SecondaryCache with HyperClockCache (HyperClockCacheOptions inherits secondary_cache option from ShardedCacheOptions)
Add new db properties rocksdb.cf-write-stall-stats, rocksdb.db-write-stall-statsand APIs to examine them in a structured way. In particular, users of GetMapProperty() with property kCFWriteStallStats/kDBWriteStallStats can now use the functions in WriteStallStatsMapKeys to find stats in the map.

Changed various functions and features in Cache that are mostly relevant to custom implementations or wrappers. Especially, asychronous lookup functionality is moved from Lookup() to a new StartAsyncLookup() function.