Zero-Downtime Database Migrations: Lessons from Production
Step-by-step methodology for executing cross-account AWS RDS and multi-cloud database cutovers with 0% data loss.
Sikander Ali
Senior DevOps Architect
Executive Engineering Summary & Takeaways
- Logical replication and continuous change data capture (CDC) synchronize live transactions prior to cutover.
- Reducing DNS TTL to 60 seconds 48 hours in advance ensures instant global propagation during switchover.
1. Logical Replication Setup
Our zero-downtime migration protocol relies on continuous replication with snapshot baseline initialization.
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