SAP-C02 Question 649
Select 2A company is migrating a critical application to AWS, which requires high availability across multiple AWS Regions. The application uses Amazon RDS for its database layer and must ensure minimal downtime and no data loss during regional failover scenarios. Which combination of actions should the Solutions Architect recommend to meet these requirements?
- A
Enable Amazon RDS Multi-AZ deployments to automatically fail over to a standby instance in the same Region.
- B
Use Amazon RDS Global Database to replicate data asynchronously between primary and secondary Regions.
- C
Configure Amazon RDS Read Replicas in the secondary Region for disaster recovery.
- D
Ensure the application uses a custom DNS solution to route traffic to the appropriate Region during failover.
- E
Use AWS Backup to create regular snapshots of the database and restore them in the secondary Region as needed.
Show answer and explanation
Correct answers: B, D
Explanation
To achieve high availability across multiple Regions with minimal downtime and no data loss, Amazon RDS Global Database is the optimal solution because it asynchronously replicates data between primary and secondary Regions. Additionally, implementing a custom DNS solution ensures that applications can dynamically route traffic to the correct Region in the event of a failover. These approaches together meet the stated requirements, whereas other options either do not provide regional failover capabilities or require manual intervention, which could lead to longer downtime.
- A. Incorrect.
Amazon RDS Multi-AZ deployments improve availability within the same Region but do not provide cross-Region failover capabilities. This does not meet the requirement for high availability across multiple Regions.
- B. Correct.
Amazon RDS Global Database replicates data asynchronously between Regions and allows for fast recovery in the event of a Region failure. This aligns with the requirement for minimal downtime and no data loss.
- C. Incorrect.
Amazon RDS Read Replicas are designed for scaling read traffic and do not support automated failover. This option does not meet the requirement for high availability.
- D. Correct.
Configuring a custom DNS solution ensures the application can dynamically route traffic to the correct Region during failover. This supports the requirement for high availability.
- E. Incorrect.
AWS Backup provides a way to restore data, but it involves manual intervention and may not meet the requirement for minimal downtime and no data loss in an automated failover scenario.