Building a Production-Grade Vector Database in Rust: What We Shipped

A deep-dive into the latest FerresDB updates — from HNSW auto-tuning and PolarQuant compression to Point-in-Time Recovery, cross-encoder reranking, and a distributed Raft foundation. Over the past few months, FerresDB has grown from a focused vector search PoC into something that increasingly resembles a production system. This post walks through everything we've shipped recently — the architectural decisions, the tradeoffs, and the honest "here's why we did it this way" behind each feature.