Tag
vector-index
- Aug 21, 2026 Similarity Metrics and the Normalisation They Require Why cosine, inner product, and Euclidean distance rank differently, what L2 normalisation changes about a vector index, and which failures come from mixing conventions. inference systems
- Jan 8, 2026 Approximate Nearest Neighbour Indexes and the Recall They Trade Away How graph, cluster, and hash indexes reduce a linear scan to a bounded walk, which knob controls recall, and why recall is a property of the query distribution rather than the index. inference systems
- Nov 17, 2025 Tombstones, Merges, and the Cost of Keeping a Vector Index Current Why deleting from a proximity graph is harder than inserting, how segment-and-merge maintenance bounds the damage, and when a rebuild is cheaper than incremental repair. information retrieval
- Sep 2, 2025 Metadata Filtering Inside Vector Search Why post-filtering a top-k list cannot satisfy a restrictive predicate, how pre-filtering collapses an index walk, and what the middle strategies actually cost. inference systems