Disaster Recovery on AWS: Designing for RTO and RPO With QuickInfra

Disaster recovery is one of those capabilities that organisations claim to have and rarely test. When an actual incident occurs — a region goes down, a critical resource is accidentally deleted, a ransomware attack hits — the gap between the DR plan and reality becomes visible at the worst possible time.

RTO and RPO — What They Mean

Recovery Time Objective (RTO) is the maximum acceptable downtime: how long your application can be unavailable before the business impact becomes unacceptable. Recovery Point Objective (RPO) is the maximum acceptable data loss: how much data (measured in time) can you afford to lose if you have to restore from backup.

An application with RTO = 4 hours and RPO = 24 hours has very different infrastructure requirements than one with RTO = 5 minutes and RPO = 0 (zero data loss). The cost difference is significant — design for your actual requirements.

The Four DR Strategies

Backup and Restore (highest RTO/RPO, lowest cost): Take snapshots regularly, restore to new infrastructure when needed. RTO is measured in hours. Use for non-critical workloads or where cost is the primary constraint.

Pilot Light (moderate RTO, low cost): Keep a minimal version of your infrastructure running in the DR region — just the core database replication and critical services. Scale it up when needed. RTO is 30–60 minutes.

Warm Standby (low RTO, moderate cost): Run a scaled-down but fully functional copy of your production environment in the DR region. Data is in sync. Failover means scaling up and cutting over. RTO is under 15 minutes.

Multi-Site Active-Active (near-zero RTO/RPO, highest cost): Full production workload running in two or more regions simultaneously. Failover is a routing change.

How QuickInfra Supports DR

QuickInfra's Infrastructure Templates can be deployed across multiple regions from the same project configuration with different variable sets. This makes standing up a pilot light or warm standby environment significantly faster.

Custom Scripts handle scheduled operations: RDS snapshot copy to the DR region, S3 cross-region replication verification, DNS failover testing. Scheduling these through QuickInfra ensures they run consistently and their output is logged.

DR Testing

An untested DR plan provides false confidence. QuickInfra recommends quarterly DR tests: trigger a failover to the DR environment in a maintenance window, validate that the application works correctly from DR infrastructure, measure the actual RTO against the target, then fail back. The QuickInfra audit log provides a timestamped record of the test for compliance evidence.