10.6.2 (2025-09-15)

Bug Fixes

• Fix a race condition in FIFO size-based compaction where concurrent threads could select the same non-L0 file, causing assertion failures in debug builds or "Cannot delete table file from LSM tree" errors in release builds.

10.6.1 (2025-09-05)

New Features

• Add the fail_if_no_udi_on_open flag in BlockBasedTableOption to control whether a missing user defined index block in a SST is a hard error or not.
• Add new option MultiScanArgs::max_prefetch_size that limits the memory usage of per file pinning of prefetched blocks.

10.6.0 (2025-08-22)

New Features

• Introduce column family option cf_allow_ingest_behind. This option aims to replace DBOptions::allow_ingest_behind to enable ingest behind at the per-CF level. DBOptions::allow_ingest_behind is deprecated.
• Introduce MultiScanArgs::io_coalesce_threshold to allow a configurable IO coalescing threshold.

Public API Changes

• IngestExternalFileOptions::allow_db_generated_files now allows files ingestion of any DB generated SST file, instead of only the ones with all keys having sequence number 0.
• decouple_partitioned_filters = true is now the default in BlockBasedTableOptions.
• GetTtl() API is now available in TTL DB
• Minimum supported version of LZ4 library is now 1.7.0 (r129 from 2015)
• Some changes to experimental Compressor and CompressionManager APIs
• A new Filesystem::SyncFile function is added for syncing a file that was already written, such as on file ingestion. The default implementation matches previous RocksDB behavior: re-open the file for read-write, sync it, and close it. We recommend overriding for FileSystems that do not require syncing for crash recovery or do not handle (well) re-opening for writes.

Behavior Changes

• When allow_ingest_behind is enabled, compaction will no longer drop tombstones based on the absence of underlying data. Tombstones will be preserved to apply to ingested files.

Bug Fixes

• Files in dropped column family won't be returned to the caller upon successful, offline MANIFEST iteration in GetFileChecksumsFromCurrentManifest.
• Fix a bug in MultiScan that causes it to fall back to a normal scan when dictionary compression is enabled.
• Fix a crash in iterator Prepare() when fill_cache=false
• Fix a bug in MultiScan where incorrect results can be returned when a Scan's range is across multiple files.
• Fixed a bug in remote compaction that may mistakenly delete live SST file(s) during the cleanup phase when no keys survive the compaction (all expired)
• Allow a user defined index to be configured from a string.
• Make the User Defined Index interface consistently use the user key format, fixing the previous mixed usage of internal and user key.

Performance Improvements

• Small improvement to CPU efficiency of compression using built-in algorithms, and a dramatic efficiency improvement for LZ4HC, based on reusing data structures between invocations.