DOP-C02 Question 185
Select 2Your organization hosts a critical multi-tier application in AWS. The application uses an Amazon RDS database for storage and an Auto Scaling group to manage the application servers. The recovery time objective (RTO) is 15 minutes, and the recovery point objective (RPO) is 5 minutes. Recently, the organization experienced an outage, and the database recovery time exceeded the RTO. As the DevOps engineer, you need to implement automated recovery mechanisms to meet the RTO and RPO requirements. Which of the following solutions should you implement?
- A
Enable Amazon RDS automated backups with a 5-minute backup window and perform manual restores during outages.
- B
Implement Amazon RDS Multi-AZ deployments to ensure high availability and automated failover.
- C
Configure Amazon RDS Read Replicas in a different Region and promote one to primary during an outage.
- D
Use Amazon CloudWatch Alarms to monitor the Auto Scaling group and automatically trigger scaling events to maintain application availability.
- E
Deploy a fully automated AWS Elastic Disaster Recovery (AWS DRS) solution for the application servers and database.
Show answer and explanation
Correct answers: B, E
Explanation
To meet the RTO of 15 minutes and the RPO of 5 minutes, automated recovery solutions must be implemented. Amazon RDS Multi-AZ deployments ensure high availability and automated failover for the database, meeting the RTO requirement. AWS Elastic Disaster Recovery (AWS DRS) provides a fully automated recovery process for the application servers and database, ensuring both the RTO and RPO are met. Other options either require manual intervention or do not address the requirements effectively.
- A. Incorrect.
Amazon RDS automated backups are useful for restoring data but do not guarantee recovery within the RTO of 15 minutes, as manual intervention is required.
- B. Correct.
Amazon RDS Multi-AZ deployments provide high availability and automated failover, ensuring that the database recovery time meets the 15-minute RTO requirement.
- C. Incorrect.
Amazon RDS Read Replicas are designed for read scalability and not high availability. Promoting a Read Replica to a primary database involves manual steps, which may exceed the RTO.
- D. Incorrect.
Using CloudWatch Alarms to trigger scaling events can improve application availability but does not directly address database recovery or meet the RTO/RPO requirements.
- E. Correct.
AWS Elastic Disaster Recovery (AWS DRS) provides a fully automated recovery process for applications and databases, ensuring that both the RTO and RPO requirements are met.