Question

A company runs a critical web application in a single AWS Region backed by an Amazon RDS database. Management requires a disaster recovery plan in a second Region with an RTO of approximately 1 hour and an RPO of a few minutes, while keeping ongoing DR costs as low as possible. The application tier can be launched from an existing AMI within minutes. Which disaster recovery strategy best meets these requirements?

Accepted Answer

Implement a pilot light strategy, keeping an RDS cross-Region read replica running in the DR Region while application servers remain switched off until failover.

Answer

Implement a backup and restore strategy, copying nightly EBS and RDS snapshots to the DR Region and provisioning all infrastructure only after a disaster.

Answer

Implement a warm standby strategy, running a scaled-down but fully functional copy of the application and database continuously in the DR Region.

Answer

Implement a multi-site active/active strategy, serving production traffic from both Regions simultaneously with Route 53 latency-based routing.