Creating a Remote Replication Consistency Group

Prerequisites

• Role of the remote replication pair to be added to a consistency group is Primary.
• The secondary resources in remote replication pairs to be added to a consistency group must be from the same storage device.
• The replication mode of the remote replication pair to be added to the consistency group must be the same as that of the consistency group.

Precautions

If a remote replication pair is not in split status, the system will split the remote replication pair first and then add it to a consistency group.

Procedure

1. Choose Data Protection > Block Protection > Remote Replication Consistency Group.
2. Click Create.

   The Create Remote Replication Consistency Group page is displayed.

3. Set the basic information about the consistency group. Table 1 describes related parameters.

   Table 1 Consistency group parameters

   Parameter	Description
   Name	Indicates the name of a remote replication consistency group. [Value range] A name must be unique. A name can only contain digits, letters, underscores (_), and hyphens (-) and must start with a digit or letter. A name must contain 1 to 31 characters.
   Replication Cluster	Indicates a replication cluster to which the consistency group belongs.
   Remote Device	Indicates a remote storage device to which the secondary resource of the remote replication pair to be added to the consistency group belongs.

4. Optional: Add a remote replication pair to the remote replication consistency group.
   1. Select Add Remote Replication Pair.
   2. In the Available Remote Replication Pairs area, select one or more remote replication pairs and click to add them to the Selected Remote Replication Pairs area on the right.

5. Click Advanced to set advanced properties of the remote replication consistency group. Table 2 describes related parameters.

   Table 2 Advanced parameters of a remote replication consistency group

   Parameter	Description
   Speed	Indicates the data synchronization speed of a remote replication consistency group. The value ranges from 1 MB/s to 1024 MB/s (or 1024 KB/s to 1,048,576 KB/s). The default value is 32 MB/s.
   Recovery Policy	Indicates whether the system automatically synchronizes data after a remote replication fault is rectified. The default value is Automatic. [Value range] Automatic: The previous ongoing tasks automatically resume immediately after the remote replication fault is rectified. Manual: The value of Running Status changes to To be recovered after the remote replication fault is rectified. In this case, you can check the system and then determine whether to resume the previous ongoing tasks manually.
   Synchronization Method	Indicates the data synchronization mode between primary and secondary resources. [Value range] Manual: Data must be manually synchronized between primary and secondary resources. Timed wait after synchronization begins: The system starts timing as soon as the latest synchronization begins. When the time specified in Interval has elapsed, the system automatically starts to synchronize data between primary and secondary resources again. NOTE: If the latest synchronization is still being executed after the time specified in Interval has elapsed, data synchronization will start after the latest synchronization finishes. Specific time policy: The system automatically synchronizes data between primary and secondary resources based on a specific time policy.
   Interval	Set Timed wait after synchronization begins. [Value range] An integer ranging from 1 to 1440, when minutes is used as the unit. An integer ranging from 10 to 86,400, when seconds is used as the unit. NOTE: This parameter is available only when Synchronization Method is set to Timed wait after synchronization begins.
   Time Policy	The system automatically synchronizes data between primary and secondary resources based on a specific time policy. [Value range] Daily: Data synchronization begins on every day. Its value ranges from 00:00 to 23:59. Hourly: Data synchronization begins in every hour. Its value is an integer ranging from 0 to 59. NOTE: This parameter is available only when Synchronization Method is set to Specific time policy.

6. Click OK.