Show HN: I "built" Sana, a vector DB on object storage

A developer released Sana, an open-source vector database built on object storage that supports vectors, full-text search, and attribute filters. The project, inspired by turbopuffer, uses object stores like S3 as the durable home for documents and includes features like WAL-based durability, LSM indexes, and IVF with RaBitQ quantization. Sana is intended for learning rather than production use.

An object-storage-native search database: vectors, full-text, and attribute filters over documents whose only durable home is an object store — a local directory or S3. A turbopuffer https://turbopuffer.com -inspired open-source clone, built in staged, documented commits. AI disclaimer:this is an AI-assisted project built with Claude and Codex . It exists to learn from, not to run your production on. What works: - Durable writes — WAL with a CAS-advanced commit cursor in object storage; strongly consistent reads through the unindexed overlay; idempotency keys, conditional writes, patch/delete-by-filter, write backpressure. - Indexes — LSM document SSTs, delta-tiered attribute postings, BM25 full-text with rank-safe block MAXSCORE, IVF vectors with faithful RaBitQ quantization SIMD kernels and SPFresh-style local split/merge maintenance. - One binary — a CLI, API-only serving, looped indexing/maintenance roles, all-in-one dev serving, operator GC dry-runs, and a Prometheus /metrics endpoint. - Backends — local filesystem for dev; S3-compatible stores with server-enforced conditional writes verified against MinIO . - Operations — namespace branch, cross-store copy, deterministic export, leased replica pinning, cache warming, ANN recall endpoint. cargo run --release -- demo ./data tiny end-to-end demo cargo run --release -- serve ./data HTTP service on 127.0.0.1:8080 cargo run --release --example usage library API tour cargo run --release --example latency benchmark harness User guide /djakish/sana/blob/main/docs/guide.md · Architecture /djakish/sana/blob/main/docs/ARCHITECTURE.md · Build log & decisions /djakish/sana/blob/main/docs/PROGRESS.md · Contributing /djakish/sana/blob/main/CONTRIBUTING.md · Benchmarks /djakish/sana/blob/main/docs/benchmarks.md MIT — see LICENSE /djakish/sana/blob/main/LICENSE .