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#infrastructure

3 posts tagged infrastructure.

Aug 29, 2026·5 min read

The Postgres-only AI stack

pgvector for embeddings, LISTEN/NOTIFY for jobs, row-level security for isolation. One database instead of four services, until you need more.

Aug 25, 2026·5 min read

Why hybrid search beats vector search

Dense embeddings and BM25 catch different failures. Reciprocal rank fusion in pgvector, and when pure vector search is still the right call.

Aug 7, 2026·5 min read

Choosing a vector store in 2026

A practical comparison of pgvector, Pinecone, Qdrant, and Weaviate — real cost and latency numbers from production, and why pgvector is usually enough to start.

Shanker Dhand.

AI Engineer & Technical Lead — building AI agents, RAG pipelines, and production-grade full-stack systems.

shankerdhand@gmail.com
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