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Vector

An objectstore-native vector database for approximate nearest neighbor (ANN) search. Built on SlateDB with a SPANN-style architecture: cluster centroids in memory for fast navigation, posting lists and vector data on disk for billion-scale capacity.

Features

  • SPANN index: Memory-efficient ANN search with configurable centroid ratio
  • Metadata filtering: Inverted indexes for hybrid queries combining similarity and predicates
  • Incremental updates: LIRE-style rebalancing maintains index quality without global rebuilds
  • Roaring bitmaps: Compressed posting lists for fast set operations

Design

See rfcs/0001-storage.md for the storage design.