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Domain 2.2: Highly Available ArchitecturesResilienceDisaster RecoveryAWS DRS

AWS SAA-C03 · Question 28 · Domain 2.2: Highly Available Architectures

A company has a critical database running on Amazon EC2 instances with Amazon EBS volumes. The company needs to implement a disaster recovery strategy that ensures a Recovery Point Objective (RPO) of 5 minutes and a Recovery Time Objective (RTO) of less than 1 hour in a different AWS Region. <br/><br/>Which solution meets these requirements with the LEAST operational overhead?

Answer options:

A.

Write a custom script to take EBS snapshots every 5 minutes and copy them to the DR region.

B.

Use AWS Backup to create a backup plan that takes cross-region snapshots every 5 minutes.

C.

Use Amazon Data Lifecycle Manager (DLM) to schedule cross-region EBS snapshots every 5 minutes.

D.

Use AWS Elastic Disaster Recovery (AWS DRS) to continuously replicate the EC2 instances to the DR region.

How to approach this question

Recognize that sub-hour RPOs for EC2/EBS require continuous replication, not snapshot-based backups.

Full Answer

D.Use AWS Elastic Disaster Recovery (AWS DRS) to continuously replicate the EC2 instances to the DR region.✓ Correct
Use Amazon Data Lifecycle Manager (DLM) to schedule cross-region EBS snapshots every 5 minutes.
AWS Elastic Disaster Recovery (AWS DRS) minimizes downtime and data loss with fast, reliable recovery of on-premises and cloud-based applications using affordable storage, minimal compute, and point-in-time recovery. It provides continuous replication, allowing for RPOs in seconds.

Common mistakes

Thinking AWS Backup or DLM can take snapshots every 5 minutes (minimum is 1 hour).

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