Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 896 discussion

A - Read replicas can't automatically provide failover in the event of a disaster. B - Aurora Global Databases are designed for cross-region replication and are synchronous, which means they can meet a low RPO (within seconds). Then failover is automated, meaning that if the primary region fails, traffic can be redirected to the secondary region automatically. C - Aurora does not automatically fail over with cross-region replication. You need to promote the replica manually, which could take longer than 20 minutes. The 5-minute RPO might not be met either. D - Well, just too much work to do manually. Let's simply rule it out.

B. Convert the Aurora cluster to an Aurora global database. Configure managed failover.

I go for B. However, C is also a good option except manual failover intervention

Answer:B https://aws.amazon.com/rds/aurora/global-database/ Cross-Region disaster recovery If your primary Region suffers a performance degradation or outage, you can promote one of the secondary Regions to take read/write responsibilities. An Aurora cluster can recover in less than 1 minute, even in the event of a complete Regional outage. This provides your application with an effective recovery point objective (RPO) of 1 second and a recovery time objective (RTO) of less than 1 minute, providing a strong foundation for a global business continuity plan.

Aurora Global Database: allowing a single Amazon Aurora database to span multiple AWS Regions. It replicates your data with no impact on database performance, enables fast local reads with low latency in each Region, and provides disaster recovery from Region-wide outages.