Optimal Data Migration Solution for Migrating from RDS MySQL to Aurora MySQL Database Cluster

Answer: C.

Option A is incorrect because using DMS in this scenario is not the most optimal solution from an operational and cost-effective point of view.It requires manual planning and execution of migration steps and additional infrastructure to support DMS.

Option B is incorrect because it is not the most optimal solution.

It requires manual steps to perform the data migration, and it does not take advantage of native capabilities offered by AWS.

Option C is CORRECT because it is possible to create an Aurora Replica of an existing RDS MySQL database.This automatically migrates the data from source to target.Once data migration is complete, it is possible to promote the read replica to a stand-alone cluster.This is the recommended approach to migrate data from the RDS MySQL database to an Aurora MySQL Cluster.

Option D is incorrect because it is not the most optimal solution.It requires manual steps to perform data export and import.

Additionally, it incurs costs associated with S3 storage.

Reference:

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Migrating.RDSMySQL.Replica.html

The optimal solution for performing data migration from an RDS MySQL database instance to an Aurora MySQL database cluster is to use the AWS Database Migration Service (DMS) to migrate the data.

Option A is the recommended option because it provides a reliable and efficient way to migrate data from a source database to a target database. AWS DMS is a fully managed service that can migrate data between different database platforms, including RDS and Aurora, with minimal downtime and data loss. It uses a replication instance to capture changes made to the source database, and then applies those changes to the target database.

Option B, using the MySQL mysqldump utility, is a valid option but may not be the best choice for large databases. It involves dumping the data from the source database into a file, transferring the file to the target database, and then restoring the data from the file. This process can be time-consuming and may result in significant downtime.

Option C, creating an Aurora Read Replica of the source database and promoting it to a stand-alone DB cluster after the migration is complete, is not the optimal solution for several reasons. Firstly, creating a Read Replica involves additional configuration and management overhead. Secondly, promoting the Read Replica to a stand-alone DB cluster requires downtime, which may not be acceptable for some applications.

Option D, copying the backup files from the source database to an Amazon S3 bucket and restoring the Aurora MySQL DB cluster from those files, is not the recommended solution because it can be complex and error-prone. It also requires downtime for the restore process.

In summary, the best option for performing data migration from an RDS MySQL database instance to an Aurora MySQL database cluster is to use the AWS Database Migration Service (DMS).