Redis: The 67k-Star Cache That Changed Its License and Split in Two — A Deep Dive Into the Valkey Fork
Redis powered half the internet's caches under a permissive BSD license for fifteen years. Then in March 2024 it went source-available, and within a week the Linux Foundation forked it into Valkey. This deep dive covers the relicensing, the fork, the wire-compatible migration, the Redis 8 AGPL olive branch, real self-hosting costs, and where your data actually lives.