- Enable automatic instance migration when you create a DDH:
Select Automatic Instance Migration upon DDH Failure under DDH Settings.
- Enable automatic instance migration after you create a DDH:
- Choose .
- Click the Action on Maintenance switch.
If the automatic instance migration function is disabled and your DDH fails, you must submit a ticket to apply for a new DDH.
After the instance is migrated, the DDH ID and the metadata of the ECS instance remain unchanged. The metadata includes the ID, internal network IP address, and public network IP address of the ECS instance. The machine ID of the DDH is updated.