Change log

:crystal_ball: Features

• Experimental support for distributed deployment - [docs] [issues]

  • Cluster topology synchronization via Raft consensus protocol
  • Sharding for the collections
  • Distributed search and updates
  • Cluster status API - https://github.com/qdrant/qdrant/issues/605

• Filtering by similarity score - https://github.com/qdrant/qdrant/issues/113

• On-disk payload storage - https://github.com/qdrant/qdrant/issues/406

  • Store large payload with less RAM usage

• On-flight payload indexing - payload indexes are available without segment re-build

  • Streaming updates for Numeric, Keyword, and Geo indexes: https://github.com/qdrant/qdrant/issues/575, https://github.com/qdrant/qdrant/issues/592, https://github.com/qdrant/qdrant/issues/593

:wrench: Improvements

• Faster payload index - https://github.com/qdrant/qdrant/pull/461

• Better error reporting

  • Return errors as JSON https://github.com/qdrant/qdrant/issues/555
  • Better handling of mismatched enums https://github.com/qdrant/qdrant/issues/551

• Enable CORS headers for Swagger UI access - https://github.com/qdrant/qdrant/issues/610

• HNSW Speed improvements (https://github.com/qdrant/qdrant/pull/508, https://github.com/qdrant/qdrant/pull/513)

• Storage optimization

  • RocksDB better log rotation - https://github.com/qdrant/qdrant/issues/516
  • Disable redundant WAL in RocksDB - https://github.com/qdrant/qdrant/pull/576
  • Unite RocksDB columns in single DB - https://github.com/qdrant/qdrant/pull/585
  • Parallel segment creation - https://github.com/qdrant/qdrant/pull/598

• Better support for Int payload in gRPC - https://github.com/qdrant/qdrant/pull/564

:construction: Breaking changes

• Due to significant changes in payload storage, collections created with the previous engine version are not compatible with the new version. The most straightforward migration approach would be to re-create collections with the latest version from scratch. Breaking changes are required to make our v1.0 release as legacy-free as possible. Hope for your understanding.

:hourglass: Work-in-progress

• We are continuing the development of Distributed Deployment. In next release we will address shard re-balancing and replication issues. Stay tuned and check out our Roadmap for details.