AWS Certified Solutions Architect – Professional (SAP-C02) — Question 241

A company hosts a web application on AWS in the us-east-1 Region. The application servers are distributed across three Availability Zones behind an Application Load Balancer. The database is hosted in a MySQL database on an Amazon EC2 instance. A solutions architect needs to design a cross-Region data recovery solution using AWS services with an RTO of less than 5 minutes and an RPO of less than 1 minute. The solutions architect is deploying application servers in us-west-2, and has configured Amazon Route 53 health checks and DNS failover to us-west-2.

Which additional step should the solutions architect take?

Answer options

• A. Migrate the database to an Amazon RDS for MySQL instance with a cross-Region read replica in us-west-2.
• B. Migrate the database to an Amazon Aurora global database with the primary in us-east-1 and the secondary in us-west-2.
• C. Migrate the database to an Amazon RDS for MySQL instance with a Multi-AZ deployment.
• D. Create a MySQL standby database on an Amazon EC2 instance in us-west-2.

Correct answer: B

Explanation

Option B is correct because Amazon Aurora global database provides a low-latency cross-Region replication solution that meets the RTO and RPO requirements. The other options either do not offer the necessary cross-Region capabilities (A and D) or do not ensure the required recovery objectives due to their architecture limitations (C).