How PlanetScale turned 768 shards into one logical database
PlanetScale scaled its MySQL‑compatible service to 768 shards, turning a petabyte‑scale data store into a single logical database. The post walks through the sharding architecture, read‑replica patterns, and operational trade‑offs that let millions of queries per second stay consistent. It shows how careful partitioning can turn a massive farm into a seamless developer experience.