This means you can fail or switch over your writer instance to another region without updating the write endpoint in your applications. Simplifies multi-region implementations a lot!
AWS highlights the importance of establishing VPC connectivity between the client application and both primary and secondary regions. Without this setup, the application cannot access the IP addresses in the newly promoted primary region.
Monitoring DNS caching after a global database failover or switchover is crucial: Aurora Global Database emits an RDS event that can be used to invalidate the application's DNS cache.
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