Building and deploying MySQL Raft at Meta


At Meta, we run one of the largest deployments of MySQL in the world. The deployment powers the social graph along with many other services, like Messaging, Ads, and Feed. Over the last few years, we have implemented MySQL Raft, a Raft consensus engine that was integrated with MySQL to build a replicated state machine. We have migrated a large portion of our deployment to MySQL Raft and plan to fully replace the current MySQL semisynchronous databases with it. The project has delivered significant benefits to the MySQL deployment at Meta, including higher reliability, provable safety, significant improvements in failover time, and operational simplicity — all with equal or comparable write performance.



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