SAP-C02 Question 210
Single answerA retail company wants to implement a disaster recovery (DR) solution for its e-commerce application hosted on AWS. The application consists of web servers behind an Application Load Balancer, a relational database hosted in Amazon RDS, and static content stored in Amazon S3. The company has a Recovery Time Objective (RTO) of 1 hour and a Recovery Point Objective (RPO) of 15 minutes. Which disaster recovery strategy is the most cost-effective while meeting these requirements?
- A
Backup and Restore
- B
Pilot Light
- C
Warm Standby
- D
Multi-Region Active-Active
Show answer and explanation
Correct answer: C
Explanation
Warm Standby is the best disaster recovery strategy for this scenario because it balances cost and performance. By keeping a scaled-down version of the application running in a secondary region, it ensures that infrastructure is already in place and can be scaled up quickly to meet the RTO of 1 hour. Additionally, data replication to the secondary region ensures that the RPO of 15 minutes is met. Backup and Restore and Pilot Light fail to meet the RTO, while Multi-Region Active-Active is unnecessarily expensive for the company's requirements.
- A. Incorrect.
Backup and Restore is the most cost-effective option but does not meet the RTO of 1 hour due to the significant time required to restore backups and redeploy infrastructure.
- B. Incorrect.
Pilot Light involves maintaining minimal resources in a secondary region, such as critical databases or core components. While cost-effective, it may not meet the RTO of 1 hour because additional resources and scaling would need to be provisioned during a disaster.
- C. Correct.
Warm Standby keeps a scaled-down but fully functional version of the application in a secondary region. It meets both the RTO of 1 hour and the RPO of 15 minutes while remaining more cost-effective than Multi-Region Active-Active.
- D. Incorrect.
Multi-Region Active-Active provides the best recovery times as both regions are fully operational at all times, but it is the most expensive option and exceeds the cost-effectiveness requirement.