If the source is RDS MySQL, or a source that doesn't grant SUPERUSER privileges, then additional steps are required for successful migration, including a brief write downtime on the source. For more information, see the RDS-specific section for guidelines.
The MySQL system database isn't migrated as part of the server migration, which means information about user roles isn't included.
Encrypted databases can't be migrated.
During migration, the destination Cloud SQL database is in read-only mode, to prevent modification of the database which might break the migration process or data integrity. After the destination is promoted, it becomes writable.
Presently, Database Migration Service isn't compatible with MariaDB.
- Up to 2,000 connection profiles and 1,000 migration jobs can exist at any given time. To create space for more, migration jobs (including completed ones) and connection profiles can be deleted.