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 Backup flowchart¶
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.