GoKawiilturbopuffer rebuilds storage engine, demotes vector index to secondary role
turbopuffer, the serverless vector database used by Cursor and Notion, is overhauling its storage architecture in a project internally called 'turbopuffer v3'. Engineer Dan Harrison says the company is replacing its ANN vector index as the primary data structure, making it just one of several secondary indexes supported by a new core engine.
GoKawiil's interpretation of the reporting above, not reported fact.
turbopuffer began as a narrowly specialized vector search tool, but Harrison's account suggests the product has outgrown that design as customers push it toward broader search workloads. Restructuring around a new primary index could let the database support more varied query types at larger scale, though the practical performance and cost tradeoffs of the new architecture are not yet detailed.
- turbopuffer is replacing its storage architecture in a project dubbed 'turbopuffer v3'.
- The ANN vector index, previously the system's core structure, is being turned into a secondary index.
- Engineer Dan Harrison says the change aims to support more query plans at greater scale.
Source: turbopuffer.com, 2026-10-01
Published there as: “RIP, vector database”
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