Uber's upgrade from MySQL 5.7 to 8.0 required over a year, improving database performance while minimizing downtime and ensuring data integrity through a detailed side-by-side strategy.
The engineering team automated a multi-stage upgrade process, which allowed over 2,100 clusters to migrate seamlessly to MySQL 8.0 without manual intervention, a significant achievement.
To minimize service disruption during the upgrade, Uber first added a MySQL 8.0 replica node for each cluster, allowing for thorough performance monitoring before switching traffic.
Stability and data integrity remained core to the upgrade, necessitating an immediate rollback strategy if performance issues emerged, ensuring that the transition maintained system reliability.
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