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Vector Databases at Warehouse Scale Quietly Break Top-K Search

TL;DR — Running vector search at warehouse scale forces you to partition the index by tenant, time, or shard — but that partitioning breaks the global top-k guarantee vector search is supposed to provide. You end up stacking two approximations: the ANN algorithm's recall loss, and a merge-across-sh…

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  1. 2026-11-08 14:16 · DEV Community — AI
    Vector Databases at Warehouse Scale Quietly Break Top-K Search

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