DRs

Relevant Links:

• How an insurance company implements disaster recovery of 3-tier applications

DRs Stragegies:

1. Backup & Restore

   • Uses: AWS Backup, S3, AMIs, EBS snapshots

   • RPO: Hours (depends on backup frequency)

   • RTO: 24+ hours

   • Cost: $

2. Pilot Light

   • Uses: EC2 minimal standby, RDS replicas

   • RPO: Minutes to hours

   • RTO: Tens of minutes to hours

   • Cost: $$

3. Warm Standby

   • Uses: Route 53, Auto Scaling Groups, reduced capacity standby

   • RPO: Minutes

   • RTO: Minutes

   • Cost: $$$

4. Multi-Site Active/Active

   • Uses: Route 53 with health checks, DynamoDB global tables

   • RPO: Near zero

   • RTO: Near zero

   • Cost: $$$$

Reference: AWS Disaster Recovery Documentation