LSM Vector updates and fixes by robfrank · Pull Request #2831 · ArcadeData/arcadedb (original) (raw)
Summary of Changes
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This pull request primarily focuses on refining the handling of vector indexes, particularly for compacted versions, to improve their loading, compaction, and overall robustness. It also introduces a more reliable method for converting arrays to lists for serialization and comparison across different components, and enhances integration tests for vector import and querying.
Highlights
- Support for Compacted Vector Indexes: The system can now correctly load and distinguish compacted vector index files (LSMVectorIndexCompacted) from regular index files, ensuring proper instantiation during database operations.
- Improved Vector Index Compaction Logic: Page reading during compaction in LSMVectorIndexCompactor has been enhanced by using page-specific methods instead of direct ByteBuffer access, which correctly handles page headers and reduces corruption risk. Validation for pointer bounds and entry offsets was also added.
- Optimized Page Versioning During Compaction: Compaction logic was updated to avoid unnecessary page version tracking for newly created pages, as these pages are fresh and not subject to Write-Ahead Log (WAL) versioning.
- Robust Array-to-List Conversion Utility: A new arrayToList utility method was introduced in BinaryComparator and JsonSerializer to safely convert both primitive and object arrays into lists for consistent serialization and comparison, replacing previous Arrays.asList and List.of usages.
- Schema Registration for Compacted Indexes: The file extension for compacted vector indexes has been registered with the database schema's component factory, ensuring they are properly recognized and loaded.
- Enhanced Vector Importer Integration Tests: The GloVe vector importer integration test now includes a new test case to verify vector neighbor queries and index creation, and the import command syntax was refactored for better readability using multi-line strings.
- Debugging Aid for Vector Index Creation: A debug print statement was added to the text embeddings importer to assist in troubleshooting issues during vector index creation. Using Gemini Code Assist
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