DOP-C02 Question 193
Single answerAn e-commerce company is designing its disaster recovery (DR) strategy for an application running on AWS. The application must remain available with minimal downtime and data loss in the event of a regional failure. The company determines that the Recovery Time Objective (RTO) should be less than 5 minutes and the Recovery Point Objective (RPO) should be less than 1 minute. Which disaster recovery strategy is most appropriate for this requirement?
- A
Backup and Restore
- B
Pilot Light
- C
Warm Standby
- D
Multi-Region Active-Active
Show answer and explanation
Correct answer: D
Explanation
The RTO (Recovery Time Objective) and RPO (Recovery Point Objective) requirements of less than 5 minutes and 1 minute, respectively, demand a disaster recovery strategy that ensures near-instantaneous failover and minimal data loss. Multi-Region Active-Active is the only strategy that fulfills these requirements by maintaining the application in multiple regions with real-time data synchronization and seamless traffic distribution. Other strategies, such as Backup and Restore, Pilot Light, and Warm Standby, involve delays in either restoring or scaling infrastructure, making them unsuitable for such stringent requirements.
- A. Incorrect.
Backup and Restore is a cost-effective disaster recovery strategy but does not meet the RTO and RPO requirements of less than 5 minutes and 1 minute, respectively, as it involves significant time to restore backups and synchronize data.
- B. Incorrect.
Pilot Light is a partially scaled-down version of the application running in a secondary region. While it reduces recovery time compared to Backup and Restore, it still requires scaling up resources, which may not meet the stringent RTO of less than 5 minutes.
- C. Incorrect.
Warm Standby keeps a scaled-down infrastructure in a secondary region ready for failover. While faster than Pilot Light, it may still not fully meet the RTO and RPO requirements for a highly-critical application requiring almost instantaneous failover.
- D. Correct.
Multi-Region Active-Active keeps the application fully operational across multiple regions, ensuring minimal downtime and data loss. This strategy is best suited for an RTO of less than 5 minutes and an RPO of less than 1 minute, as both traffic and data are continuously synchronized across regions.