Understanding Zero Downtime Migration

Zero Downtime Migration (ZDM) gives you a quick and easy way to move on-premises databases and Oracle Cloud Infrastructure Classic instances to Oracle Cloud Infrastructure, Exadata Cloud at Customer, and Exadata Cloud Service without incurring any significant downtime, by leveraging technologies such as Oracle Active Data Guard.

For information on ZDM see Zero Downtime Migration

Using ZDM to migrate your database involves creating a backup of the source database and restoring it to the target database in OCI. The target database must be in DB System.

Once the database is migrated to OCI, you can import the DB System in Cloud Manager and add the middle tier node.