Certified Cloud Security Professional (CCSP)Cloud Security OperationsMedium
A cloud security engineer is designing a disaster recovery strategy for a critical application hosted in a public cloud. The application requires near-instantaneous recovery with minimal data loss. Which of the following disaster recovery strategies would best meet these requirements?
- ABackup and Restore
- BWarm Standby
- CPilot Light
- DMulti-region Active-Active
Show answer & explanationAnswer & explanation
Correct answer: D. Multi-region Active-Active
Multi-region Active-Active provides the highest availability and lowest RTO/RPO by running the application simultaneously in multiple regions, allowing for immediate failover with no data loss.
Why the other options are wrong
- A. Backup and Restore has the highest RTO and RPO, making it unsuitable for near-instantaneous recovery with minimal data loss.
- B. Warm Standby keeps a scaled-down version of the application running in the recovery region, which still requires scaling up and DNS changes during a disaster.
- C. Pilot Light maintains a minimal, core infrastructure in the recovery region, requiring some time to provision full resources.
Multi-region Active-Active DR
A disaster recovery strategy where the full application stack is deployed and actively serving traffic in two or more geographically separate cloud regions simultaneously.
- Provides highest availability and lowest RTO/RPO.
- Traffic is distributed across regions, and in case of a regional outage, traffic is immediately rerouted.
- Requires complex synchronization and higher operational costs.
Memory trick: Active-Active is always ready, like two busy bees.