What are the AWS Database Migration Methods to Follow

 AWS DMS (Amazon Web Service Database Migration Service) is an optimized cloud-based service that facilitates migration of on-premises databases to the cloud or from one cloud provider to another. As distinct from traditional database migration options, the source database is fully functional at all times and organizations need not upset operating schedules for downtime.

The method of AWS data migration depends on several factors.

Homogeneous database migration
This form of migration is the chosen method when the engines, the data codes, the schema structures, and the data types of the source and the target databases are similar.AWS data migration here is a one-step process, initiated as soon a connection is established through AWS DMS between the two databases. The source database may be running on an Amazon EC2 instance outside the AWS or Amazon RDS while the target database may be in Amazon RDS or the Amazon EC2 instance. Homogeneous migration includes MySQL to Amazon RDS for MySQL. Oracle to Amazon RDS for Oracle, and Microsoft SQL Server to Amazon RDS for SQL Server.

Heterogeneous database migration
Here, the source and the target database engines as well as the data codes, data types, and schema structures need to be different. Hence, AWS data migration is a two-step process. First, with the AWS Schema Conversion Tool (AWS SCT) the data code and the schema structure of the source database have to be converted to match that of the target database. Only after this step can the migration process be initiated. Some forms of heterogeneous migration are Microsoft SQL Server to MySQL migrations, Oracle to Amazon Aurora, or Oracle to PostgreSQL.

These are the two processes of AWS data migration.

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