Modifying a Replication Group

Prerequisites

• The replication group can be modified only for the default cluster.
• During service provisioning, you are advised not to change the role of a site. Otherwise, service failure may occur.

Procedure

1. Choose Data Protection > Configuration > Cross-Site DR > Replication Group.
2. In the function pane, select a desired replication group from the list on the left and choose Operation > Modify in the upper right corner.

   The Modify XXX page is displayed on the right.

3. Modify the Cluster Type, Replication Mode, and Auto Takeover of passive clusters in the replication group.
   

   • There must be at least one active cluster.
   • If only one active cluster is selected, you can specify a passive cluster among all selected passive clusters to automatically take over services in case of a fault of the active cluster.
   • If the policy type of the replication group is EC, the replication mode of clusters in the replication group cannot be modified.

4. Click OK.
5. A high-risk warning message will be displayed in the following scenarios. Confirm the operation as prompted.
   • The synchronization link latency is greater than 10 ms when synchronous replication clusters exist.
   • A passive cluster that automatically takes over services is modified.
   • If synchronous replication clusters exist and the priority of the synchronous replication clusters is lower than that of asynchronous replication clusters:
     • The DNS priority of asynchronous replication clusters is higher than that of synchronous replication clusters when both synchronous and asynchronous replication clusters are active.
     • Synchronous replication clusters are passive when a passive asynchronous replication cluster exists and auto takeover is enabled.
     • Synchronous replication clusters are passive or passive (auto takeover) when an active asynchronous replication cluster exists.