SAP-C02 Question 212
Single answerYour company runs a mission-critical application hosted on AWS, and it needs to meet a Recovery Time Objective (RTO) of 15 minutes and a Recovery Point Objective (RPO) of 5 minutes in the event of a disaster. The application consists of an Amazon RDS database, an Amazon S3 bucket for static content, and an Amazon EC2-based web application. Which disaster recovery strategy is the most appropriate to meet these requirements while optimizing costs?
- A
Pilot Light strategy with a pre-provisioned RDS instance and frequent database snapshots
- B
Backup and Restore strategy with daily backups of the RDS database and S3 bucket replication
- C
Warm Standby strategy with a scaled-down version of the entire application running in a secondary Region
- D
Multi-Region Active-Active strategy with full data replication and active workloads in both Regions
Show answer and explanation
Correct answer: C
Explanation
The Warm Standby strategy is the most appropriate solution for balancing cost and recovery objectives in this scenario. It ensures that a scaled-down version of the application is always running in a secondary Region, allowing for quick failover and meeting the RTO of 15 minutes and the RPO of 5 minutes. Other strategies either fail to meet the required RTO/RPO or incur unnecessary costs.
- A. Incorrect.
Pilot Light strategy is cost-efficient but does not meet the RTO of 15 minutes because provisioning and scaling up resources from a minimal state would require more time.
- B. Incorrect.
Backup and Restore strategy is the most cost-effective, but it cannot meet the strict RTO of 15 minutes or the RPO of 5 minutes due to the time required to restore backups and recover services.
- C. Correct.
Warm Standby strategy provides a scaled-down version of the application already running in a secondary Region, allowing faster failover and meeting the RTO and RPO requirements. It strikes a balance between cost and performance.
- D. Incorrect.
Multi-Region Active-Active strategy meets the RTO and RPO requirements but is significantly more expensive than necessary for this scenario, as it involves maintaining full capacity in multiple Regions at all times.