You are an AWS solutions architect and are in charge of maintaining an RDS on VMware database that is deployed on-premises. You have created a read replica in the ap-south-1 region to share some read traffic. The system has run smoothly for a while. Then the company decides to migrate all the products to AWS, including the on-premises RDS instance. Other than that, the instance needs to have another replica in another region ap-southeast-1. The migration process should be straightforward. What actions should you take to fulfill this requirement?

Answer options:

A.Use Data Migration Service to migrate the on-premises database to an RDS instance in AWS. Create a read replica in the ap-southeast-1 region afterward.
B.In RDS console, click “migrating the instance” to create a new RDS instance. Then create a new read replica in the ap-southeast-1 region.
C.Create another read replica in the ap-southeast-1 region to share the read traffic for the RDS instance on VMware. Promote the RDS read replica in ap-south-1 to be the new RDS instance so that the original on-premise database is migrated in AWS with a replica in ap-southeast-1.
D.Promote the RDS read replica in ap-south-1 to be the new RDS instance. Create another read replica in ap-southeast-1 for this new instance.

Correct Answer - D
 
Amazon RDS on VMware database instances can be easily migrated to Amazon RDS database instances in AWS with no impact on uptime, giving you the ability to rapidly deploy databases in all AWS regions without interrupting your customer experience. The process is as below.
Option A is incorrect: Because the Data Migration Service is not needed. You need to promote the read-replica to be the new RDS instance.
Option B is incorrect: Same reason as
Option A. Also, “migrating the instance” is incorrect.
Option C is incorrect: Because the read replica in ap-southeast-1 is still syncing with the original on-premise RDS instance. A new read replica should be created from the instance in ap-south-1.
Option D is CORRECT: Because the database can be easily migrated by promoting the read replica in ap-south-1. Please note that during migration, the performance may be impacted. In the question, it asks for a straightforward method so this option is appropriate.