A global app needs a relational DB with RPO of about 1 second and RTO under 1 minute in another region, with minimal management. What should be used?
Show answer and explanation
Answer: B
Aurora Global Database replicates from the primary cluster to a secondary region with typical lag under one second — matching the ~1 second RPO — and its managed planned and unplanned failover promotes the secondary in under a minute. It stays fully managed end to end.
Why the other options are wrong
- A. RDS Multi-AZ keeps its standby within the same region; a regional outage takes the whole deployment with it.
- C. Cross-region backups are point-in-time snapshots; restoring them means an RPO of the backup/copy interval, and the restore itself takes far longer than a minute.
- D. DMS can replicate continuously, but you provision, size, monitor, and fail over the replication instances yourself — the opposite of minimal management, and failover logic is on you.