v10.2.1

10.2.1 (2025-04-24)

Bug Fixes

• Fix improper initialization of ExternalTableOptions

10.2.0 (2025-04-21)

New Features

• Provide histogram stats COMPACTION_PREFETCH_BYTES to measure number of bytes for RocksDB's prefetching (as opposed to file
  system's prefetch) on SST file during compaction read
• A new API DB::GetNewestUserDefinedTimestamp is added to return the newest user defined timestamp seen in a column family
• Introduce API IngestWriteBatchWithIndex() for ingesting updates into DB while bypassing memtable writes. This improves performance when writing a large write batch to the DB.
• Add a new CF option memtable_op_scan_flush_trigger that triggers a flush of the memtable if an iterator's Seek()/Next() scans over a certain number of invisible entries from the memtable.

Public API Changes

• AdvancedColumnFamilyOptions.max_write_buffer_number_to_maintain is deleted. It's deprecated since introduction of a better option max_write_buffer_size_to_maintain since RocksDB 6.5.0.
• Deprecated API DB::MaxMemCompactionLevel().
• Deprecated ReadOptions::ignore_range_deletions.
• Deprecated API experimental::PromoteL0().
• Added arbitrary string map for additional options to be overriden for remote compactions
• The fail_if_options_file_error option in DBOptions has been removed. The behavior now is to always return failure in any API that fails to persist the OPTIONS file.

Behavior Changes

• Make stats PREFETCH_BYTES_USEFUL, PREFETCH_HITS, PREFETCH_BYTES only account for prefetching during user initiated scan

Bug Fixes

• Fix a bug in Posix file system that the FSWritableFile created via FileSystem::ReopenWritableFile internally does not track the correct file size.
• Fix a bug where tail size of remote compaction output is not persisted in primary db's manifest