Moving Databases with the Migration Service of AWS

The Database Migration Service (DMS) of Amazon Web Service (AWS) is a cloud-based platform that facilitates the migration of databases from on-premises systems to the cloud or from one cloud provider to another. For AWS DMS to function optimally, one of the sources or the target, or both should be functioning in a cloud environment.


The Database Migration Service is very user-friendly. First, it is compatible with the most commonly used databases. Next, DMS allows continuous data replication, and several databases can be easily consolidated into a petabyte-sized data warehouse through data streaming to Amazon Simple Storage Service (S3) or Amazon Redshift.

A very important advantage of working with AWS DMSis that the source database remains fully functional during the migration process. This is a great benefit for large data-driven organizations for whom downtime even for brief periods can upset operating schedules.

Some of the other cutting-edge benefits of AWS DMS are as follows.

  • AWS DMS provides free migration facilities when the target database is one among Amazon Redshift, Amazon Aurora, or Amazon DynamoDB.
  • Once AWS DMS is configured, migration can be immediately started as the platform offers total infrastructure support for database migration, automatically deploying, managing, and tracking the progress.
  • This cloud-based platform offers unlimited storage capacities that are flexible and on-demand. Users can download only the required capabilities and pay for the quantum of resources used. It is a very cost-saving system as unlike traditional databases, there are no flat fees regardless of the volume of storage used.
  • Another very critical component of AWS DMSis the automatic failover and reversal feature. In case there is a failure or outage of the primary server during migration, secondary servers in other remote locations are automatically triggered and there is no break in work. When the issue is resolved, the feature works in the reverse direction and all data that was generated in the break period is updated in the primary server. 
  • Services and support systems necessary for migration are automatically handled by AWS DMS. These include the functioning of hardware and software, error reporting, and software patching.
  • AWS DMS supports the most common DBMS source database engines and popular database engines and hence, migration can be undertaken between all types of source and target databases.
  • Finally, this migration platform ensures that data is moved between the source and the target in a fully safe environment. Data in the source database is encrypted with the AWS Key Management Service while data in transit between the source and the target is encrypted with the Secure Socket Layer (SSL).

Migration with AWS DMS is of two types namely Homogeneous Migration and Heterogeneous Migration. In the first instance, the database engines, data codes and types, and the schema structures of the source and the target databases are the same while for the second, all these parameters are different.

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