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Vector Databases & Retrieval Architecture Cheat Sheet: Concepts, Indexing, Quantization & Selection

A high-density reference guide to vector databases and semantic retrieval: covering distance metric formulas, ANN index algorithms (HNSW, IVF, DiskANN, ScaNN), quantization memory sizing, inline filtering, RRF hybrid search, and tiered comparison of native vector DBs, database extensions, and managed cloud services.