Percona Live 2022

Meta has gone through multiple large scale MySQL rollouts like MyRocks and 8.0 migrations. To avoid the potential data inconsistency introduced by those migrations and various other small rollouts like minor version upgrades, we implemented several large scale consistency checking tools to help surface issue at early stage. In this talk, we will cover how these tools work under the hood and share some stories about how they have helped in large-scale rollouts.