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01 ·RAG & Retrieval·★ MEMBER·PAPER·13 min read Build Your Own Vector DB — From Brute Force to HNSW Assemble a vector search engine step by step, starting from a 20-line brute-force scan. The curse of dimensionality, IVF partitioning, HNSW graph traversal and quantization, all viewed through one lens: the trade between recall and speed.