Question

A financial services company runs its primary application in us-east-1 using an Auto Scaling group behind an Application Load Balancer and an Amazon RDS Multi-AZ database. Leadership requires a disaster recovery strategy that achieves an RTO of approximately 10 minutes and an RPO of a few seconds, while keeping steady-state costs lower than running a full-scale duplicate environment. The team decides to maintain a scaled-down but always-running copy of the stack in us-west-2. Which combination best implements this DR strategy?

Accepted Answer

Run a minimal but active fleet in us-west-2 with an RDS cross-Region read replica, and on failover scale out the Auto Scaling group and promote the replica while Route 53 shifts traffic.

Answer

Keep only CloudFormation templates and AMIs in us-west-2 with no running resources, provisioning the entire stack on demand during a disaster.

Answer

Deploy a full-scale, production-sized duplicate of the environment in us-west-2 running continuously with active-active traffic distribution.

Answer

Store nightly EBS and RDS snapshots in us-west-2 and restore all resources from snapshots when a disaster is declared.