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RocksDB v5.10.0 Release Notes

Release Date: 2017-11-12 // over 6 years ago

  • Public API Change

    • When running make with environment variable USE_SSE set and PORTABLE unset, will use all machine features available locally. Previously this combination only compiled SSE-related features.

    🆕 New Features

    • 🐧 Provide lifetime hints when writing files on Linux. This reduces hardware write-amp on storage devices supporting multiple streams.
    • Add a DB stat, NUMBER_ITER_SKIP, which returns how many internal keys were skipped during iterations (e.g., due to being tombstones or duplicate versions of a key).
    • 🔒 Add PerfContext counters, key_lock_wait_count and key_lock_wait_time, which measure the number of times transactions wait on key locks and total amount of time waiting.

    🐛 Bug Fixes

    • 🛠 Fix IOError on WAL write doesn't propagate to write group follower
    • 🔀 Make iterator invalid on merge error.
    • 🛠 Fix performance issue in IngestExternalFile() affecting databases with large number of SST files.
    • 🛠 Fix possible corruption to LSM structure when DeleteFilesInRange() deletes a subset of files spanned by a DeleteRange() marker.