SAP-C02 Question 85
Select 3A company is running a critical multi-tier application on AWS. The application uses an Amazon RDS database and stores data in an Amazon S3 bucket. The company has set a Recovery Time Objective (RTO) of 4 hours and a Recovery Point Objective (RPO) of 1 hour. Which of the following solutions should the Solutions Architect implement to meet these requirements?
- A
Enable RDS automated backups with a backup retention period of 7 days.
- B
Set up S3 Versioning and configure Cross-Region Replication to a secondary region.
- C
Use AWS Backup to create daily backups of the RDS database.
- D
Configure a Multi-AZ deployment for the RDS database.
- E
Enable S3 Event Notifications to trigger an AWS Lambda function to replicate data to a secondary S3 bucket.
Show answer and explanation
Correct answers: A, B, D
Explanation
To meet the RTO of 4 hours, the RDS database must be highly available, which is achieved with a Multi-AZ deployment. To meet the RPO of 1 hour, RDS automated backups and S3 Cross-Region Replication must be implemented to ensure data recovery within the specified time frame. Daily backups and manual data replication solutions do not meet the stringent time objectives for this scenario.
- A. Correct.
This option meets the RPO requirement of 1 hour because RDS automated backups allow point-in-time recovery, but retention alone does not satisfy the high availability needs for the 4-hour RTO. However, it is a necessary part of the solution.
- B. Correct.
This option satisfies the RPO requirement because S3 Versioning and Cross-Region Replication ensure that data is available in another region within a short interval, typically measured in minutes. This contributes to meeting the RPO and RTO requirements.
- C. Incorrect.
Daily backups do not meet a 1-hour RPO requirement because they represent data at a 24-hour granularity, which is significantly outside the acceptable range. Therefore, this option is not sufficient.
- D. Correct.
A Multi-AZ deployment for the RDS database ensures high availability and automatic failover to a standby in another Availability Zone. This meets the 4-hour RTO requirement by minimizing downtime in case of a failure.
- E. Incorrect.
This option does not directly address the RPO requirement of 1 hour or the RTO of 4 hours because it introduces additional latency and reliance on a Lambda function, which is not guaranteed to meet the required recovery metrics.