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Moving databases to the cloud — or between AWS services — is a common task for organisations modernising their infrastructure. The AWS Database Migration Service (DMS) makes it possible to migrate databases with minimal downtime by continuously replicating data from the source to the target while your source database remains fully operational.
AWS DMS is a managed service that migrates data between databases. It supports:
| Component | Role |
|---|---|
| Source endpoint | Connection to the source database (on-premises, EC2, or another cloud) |
| Target endpoint | Connection to the target database (RDS, Aurora, DynamoDB, S3, Redshift, etc.) |
| Replication instance | An EC2 instance managed by DMS that runs the migration tasks |
| Migration task | Configuration that defines what to migrate, how, and when |
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