CompTIA Cloud Essentials+ (CLO-002)Cloud ConceptsHard
A cloud customer is deploying a mission-critical application that requires uninterrupted service even in the event of an entire cloud region failure. The application must remain fully operational without any data loss. Which disaster recovery strategy should the architect recommend?
- AWarm Standby
- BBackup and Restore
- CPilot Light
- DMulti-Region Active-Active
Show answer & explanationAnswer & explanation
Correct answer: D. Multi-Region Active-Active
Multi-Region Active-Active deploys the application simultaneously in multiple regions, with traffic distributed across all active deployments. This ensures immediate failover and no data loss in the event of a region-wide outage, as other regions continue to serve traffic. This strategy offers the highest availability and RTO/RPO near zero.
Why the other options are wrong
- A. Warm Standby has a fully functional but scaled-down environment, requiring some time to scale up and potentially some data synchronization, leading to a brief interruption.
- B. Backup and Restore has the longest recovery time (RTO) and potential for data loss (RPO), unsuitable for mission-critical applications requiring no interruption.
- C. Pilot Light involves a minimal deployment in the DR region, requiring time to scale up, which introduces downtime.
Multi-Region Active-Active
A disaster recovery strategy where an application is fully deployed and actively serving traffic in multiple geographically distinct cloud regions simultaneously, providing the highest availability and minimal RTO/RPO.
- Highest availability and resilience.
- Zero downtime, near-zero data loss.
- Most complex and expensive to implement.
Memory trick: BACKUP PILOTS WARM the ACTIVE regions.