Question

A financial services company runs a critical transaction-processing application in a single AWS Region using EC2 instances behind an Application Load Balancer and an Amazon RDS Multi-AZ database. Business requirements now mandate a disaster recovery plan with an RTO of about 10 minutes and minimal data loss if the primary Region fails. Cost must be kept reasonable, but the company cannot tolerate the long recovery times of restoring from backups. Which disaster recovery strategy BEST meets these requirements?

Accepted Answer

Implement a warm standby by running a scaled-down but fully functional copy of the environment in a second Region with a continuously replicating RDS read replica, scaling it up and failing over via Route 53 during a disaster.

Answer

Implement a backup-and-restore strategy by copying EBS snapshots and RDS backups to the second Region and provisioning infrastructure only after a disaster is declared.

Answer

Implement a pilot light strategy where only the RDS database is replicated to the second Region and all compute infrastructure is created from templates at failover time.

Answer

Implement a multi-site active-active architecture serving production traffic from both Regions simultaneously with global load balancing.