Every business has a disaster recovery plan. Most have never tested it. The cloud changes both parts of that equation: it makes sophisticated DR significantly cheaper to implement, and it makes testing trivially easy to automate.
Recovery Point Objective (RPO) and Recovery Time Objective (RTO) are the two metrics that define your DR requirements. RPO is the maximum acceptable data loss measured in time — if your RPO is one hour, your last backup must be no more than one hour old at any point. RTO is the maximum time from incident to recovery — if your RTO is four hours, your systems must be fully operational within four hours of a declared disaster.
Traditional DR — a secondary data centre maintained in an active-standby configuration — is expensive. Hardware duplication, network connectivity, and operational staffing for a site that may never be needed generates significant recurring cost.
Cloud DR offers three patterns at different cost and recovery speed trade-offs. Backup and Restore is the most economical: critical data is backed up to cloud storage at your RPO frequency, and in a disaster scenario, new infrastructure is provisioned from Infrastructure-as-Code templates and data is restored. RTO is measured in hours. Pilot Light maintains a minimal footprint in the cloud — core infrastructure running but scaled to near-zero — allowing rapid scale-up when needed. Warm Standby maintains a scaled-down but fully functional replica of the production environment, enabling recovery in minutes.
The critical enabler of any cloud DR strategy is Infrastructure-as-Code. If your production environment is defined as code, recovering it in another region is a pipeline execution. If it was built by hand, recovery is a multi-day manual effort under the worst possible conditions.
Test your DR plan quarterly with real failovers, not tabletop exercises. The organisations that discover gaps are the ones who find them in planned tests — not during actual disasters.