A financial institution requires a disaster recovery strategy for its critical trading application. The application uses Amazon Aurora PostgreSQL and EC2 instances in an Auto Scaling group. The business requires an RPO of 1 second and an RTO of less than 1 minute. The solution must be highly available across two AWS Regions. Which architecture meets these requirements?

Q: What mistakes do candidates make on this AWS SAP-C02 question?

Confusing standard cross-region read replicas with Aurora Global Database.

Answer options:

Use Aurora Global Database. Deploy EC2 instances in an Auto Scaling group in the secondary region with capacity set to 0. Use Amazon Route 53 with a failover routing policy.

Use Aurora cross-region read replicas. Deploy a warm standby of EC2 instances in the secondary region. Use AWS Global Accelerator for routing.

Use Amazon RDS for PostgreSQL with Multi-AZ across two regions. Use Route 53 latency-based routing.

Take continuous AWS Backup snapshots of the Aurora cluster and copy them to the secondary region. Use CloudFormation to deploy compute resources during a disaster.

How to approach this question

Match the strict RPO (1s) and RTO (<1m) to the capabilities of Aurora Global Database.

Full Answer

A.Use Aurora Global Database. Deploy EC2 instances in an Auto Scaling group in the secondary region with capacity set to 0. Use Amazon Route 53 with a failover routing policy.✓ Correct

Use Aurora Global Database. Deploy EC2 instances in an Auto Scaling group in the secondary region with capacity set to 0. Use Amazon Route 53 with a failover routing policy.

Aurora Global Database is designed for globally distributed applications, allowing a single Aurora database to span multiple AWS Regions. It replicates 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.

Common mistakes

Confusing standard cross-region read replicas with Aurora Global Database.

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