DR Patterns
- Backup and restore has the lowest cost and highest recovery time.
- Pilot light keeps core components ready and scales after failover.
- Warm standby runs a scaled-down copy that can scale up quickly.
- Active-active serves traffic in multiple Regions and has the highest complexity and cost.
Design Cues
- Use Multi-AZ for regional high availability.
- Use multi-Region designs for disaster recovery or global latency requirements.
- Use Route 53 health checks and failover routing for DNS-level recovery.
- Test restores and failovers to prove that RTO can be met.
Practice Resilience Questions
Put your knowledge to the test with practice questions.