SAA-C03 Question 183
Single answerA company operates a mission-critical web application hosted on AWS. They need a disaster recovery strategy that ensures a maximum Recovery Point Objective (RPO) of 1 hour and a Recovery Time Objective (RTO) of 15 minutes. The application must continue to serve users with minimal downtime during a regional failure. Which disaster recovery strategy is the most suitable for the company?
- A
Backup and restore
- B
Pilot light
- C
Warm standby
- D
Active-active failover
Show answer and explanation
Correct answer: D
Explanation
The company requires a disaster recovery strategy with very low RTO and RPO. Active-active failover meets these requirements by running fully operational environments in multiple regions, allowing for seamless failover and minimal downtime. Other strategies, such as backup and restore, pilot light, and warm standby, have higher recovery times or may not meet the stringent RPO and RTO requirements.
- A. Incorrect.
Backup and restore has a high RTO and RPO because it involves creating backups and restoring them during a disaster. This method is not suitable for the company's RPO of 1 hour and RTO of 15 minutes.
- B. Incorrect.
Pilot light maintains a minimal version of the application running in the secondary region, requiring additional time to scale up resources during a disaster. It cannot meet the RTO of 15 minutes.
- C. Incorrect.
Warm standby keeps a scaled-down environment running in the secondary region. While it has a faster recovery time than pilot light, it may still take longer than 15 minutes to scale up fully depending on the setup, and thus may not guarantee the required RTO.
- D. Correct.
Active-active failover involves running fully operational environments in multiple regions simultaneously, ensuring minimal downtime and meeting both the RPO of 1 hour and RTO of 15 minutes. This is the most suitable strategy for the given requirements.