Below are the main steps in the database migration workflow:
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- Register a Multi DB Migration Task
- Perform Multi DB Migration
- Pre-migration validations
- DMS resource provisioning
- Prepare source and target DB
- DMS full load data migration
- Cleanup source and target DB
- Secondary schema migration
- Post-migration schema validation
- If cutover is required
- Wait until the cutover window is approved
- Wait until the cutover window and CDC lag threshold criteria
- Execute Cutover and Cutover Time Migration
- If cutover is not required
- Execute Cutover Time Migration
- If cutover is not required and data validation is required
- Post-migration data validation
- Cleanup DMS Resources
Most of these steps happen automatically one after the other but a user can interact with the system in the following ways:
- Register a new Migration Task
- Monitor Migration Progress
- Retry a failed migration
- Abort a migration task any time
- Approve Cutover Window
Glossary
| Term | Definition |
| DMS |
AWS Data Migration Service (DMS) AWS Database Migration Service helps you migrate databases to AWS easily and securely. The source database remains fully operational during the migration, minimizing downtime to applications that rely on the database. DMS can migrate your data to and from most widely used commercial and open-source databases. |
| CDC |
Change Data Capture (CDC) Change data capture tracks/captures changes to the source database that occur while the data is being migrated from the source to the target. When the migration of the originally requested data has completed, the change data capture (CDC) process then applies the captured changes to the target database. |
| DB | Database - Source and target relational databases for the migration activity. |