DR strategy selection

• Small data, high RPO/RTO tolerance, low budget → Backup & Restore
• Fast failover for core systems only → Pilot Light
• Faster failover, some cost → Warm Standby
• Near-zero RPO/RTO, budget not concern → Active-Active

References

• Disaster Recovery of Workloads on AWS (Whitepaper)
• AWS Well-Architected Framework (Whitepaper)