CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

1.1.0 - 2021-09-27

Added

• Add links to the version headings in the CHANGELOG.

Changed

• Update hnswlib code to release v0.5.2.
• Use Go version 1.17.
• Upgrade dependencies.
• Regenerate pb/grpc files with protoc-gen-go v1.27.1 and protoc v3.17.3.

1.0.0 - 2021-05-01

Added

• Significantly increased data durability with the introduction of Write-Ahead Logging (WAL).

  A record of all operations performed on an index is appended to a Write-Ahead Log (WAL) file (see pkg/wal package). The log is emptied only after each successful saving operation, that is, once the in-memory content of the index is "securely" persisted on disk. If a log file is present, any recorded operation is re-applied while loading an existing index.

Changed

• Breaking: HNSW internal state structure changed in a back-incompatible way.

  The internal state (i.e. type hnswState), which is persisted to disk when saving an index, now contains all the index configuration parameters. This might be convenient for indices inspection and recovery.

• Refactor and improve test cases.

Removed

• File hnsw_wrapper.o, which is part of the building process.

Fixed

• Fix bug causing re-loaded indices to break when inserting new vectors.

0.2.0 - 2021-04-28

Added

• Tests.
• GitHub Workflow CI.
• This CHANGELOG file.

Changed

• Improved indices saving and loading implementation.
• Improved logging.
• Significant code refactoring.

0.1.1 - 2021-04-13

Added

• Methods InsertVectorWithId and InsertVectorsWithIds.

0.1.0 - 2021-04-05

Added

• First release.