Backup Principles
DDM instances cannot be backed up manually. The system automatically backs them up at 02:00 UTC+00:00 every day. Metadata backup can also be triggered by any of the key operations such as deleting a schema, clearing source data after shard configuration, and deleting a DDM instance.
Figure 1 illustrates the backup process.
Figure 1 Backup principles
Note
The metadata database stores information of your DDM instances and their associated data nodes. All of your DDM instances in different regions share the same metadata database.
Parent topic: Backups and Restorations