SOA-C02 Question 117
Select 3Your organization hosts a critical application in AWS with an RDS database in the us-east-1 region. To ensure disaster recovery, you are tasked with creating a failover mechanism to another AWS region, us-west-2, with minimal downtime in the event of a regional outage. Which of the following steps should you implement to achieve this?
- A
Enable RDS Multi-AZ deployment for the database in us-east-1.
- B
Set up a cross-region RDS read replica in us-west-2.
- C
Promote the read replica in us-west-2 to a standalone database during a disaster.
- D
Enable automatic failover to the read replica in us-west-2.
- E
Configure Route 53 to use a failover routing policy for the application's database endpoint.
Show answer and explanation
Correct answers: B, C, E
Explanation
To ensure disaster recovery across AWS regions, you must set up a cross-region RDS read replica to replicate data to another region (us-west-2). During a disaster, you promote the read replica to a standalone database to handle write operations. Additionally, configuring Route 53 with a failover routing policy enables seamless redirection of traffic to the new database endpoint. Multi-AZ deployment and automatic failover are applicable only within a single region, not across regions.
- A. Incorrect.
Enabling RDS Multi-AZ deployment only provides high availability within a single region. It does not provide disaster recovery capabilities across different regions.
- B. Correct.
Setting up a cross-region RDS read replica in us-west-2 ensures that a copy of your database is available in another region for disaster recovery purposes.
- C. Correct.
Promoting the read replica in us-west-2 to a standalone database during a disaster allows it to handle write operations, making it usable as the primary database in the new region.
- D. Incorrect.
RDS does not support automatic failover across regions. Failover to a cross-region read replica requires manual intervention.
- E. Correct.
Configuring Route 53 with a failover routing policy ensures that traffic can be routed to the new database endpoint in us-west-2 during a disaster.