A company is designing a disaster recovery plan for a critical application. The application uses Amazon EC2, Amazon RDS for MySQL, and Amazon S3. The business requires an RPO of 1 hour and an RTO of 4 hours. The DR site is in a different AWS Region. Which combination of actions will meet these requirements MOST cost-effectively? (Select THREE)

Answer options:

Configure Amazon RDS cross-region automated backups.

Deploy an active-active architecture across both regions.

Use AWS Backup to schedule hourly cross-region snapshots of the EC2 instances.

Configure S3 Cross-Region Replication (CRR) for the S3 buckets.

Use AWS Elastic Disaster Recovery (DRS) for continuous replication.

Create an Aurora Global Database.

How to approach this question

Select backup/replication strategies that match the RPO/RTO without overspending.

Full Answer

For a 1-hour RPO and 4-hour RTO, snapshot-based backups and asynchronous replication are sufficient and cost-effective. Active-active or continuous replication (DRS) would be over-provisioning and too expensive.

Common mistakes

Choosing DRS or Active-Active, which are for near-zero RPO/RTO and cost significantly more.

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