Modifying Properties of a Remote Replication Consistency Group

Precautions

After the properties of a remote replication consistency group are modified, the properties of pairs in the consistency group remain unchanged. However, the working properties are consistent with those of the consistency group.

Procedure

1. Choose Data Protection > Protection Entity > Protection Group > Remote Replication Consistency Group.
2. Click More on the right of the desired remote replication consistency group and select Modify.

   The Modify Remote Replication Consistency Group page is displayed.

3. Modify properties of the remote replication consistency group. Table 1 describes related parameters.

   Table 1 Remote replication consistency group parameters

   Parameter	Description
   Name	Indicates the name of a remote replication consistency group. [Value range] The name must be unique. The name can only contain digits, letters, underscores (_), and hyphens (-), and must start with a digit or letter. The name contains 1 to 31 characters.
   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). During initial synchronization, the recommended rate is 100 MB/s or higher. During incremental synchronization, if the service is busy, the recommended rate is 0 MB/s to 20 MB/s. During incremental synchronization, if the service load is heavy, the recommended rate is 20 MB/s to 70 MB/s. During incremental synchronization, if the service is idle, the recommended rate is 100 MB/s or higher. The default value is 32 MB/s.
   Recovery Policy	Indicates whether the system automatically synchronizes data after a remote replication fault is rectified. [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.
   Sync Type	Determines how data is synchronized between primary and secondary resources. Possible values are: Manual: Data must be manually synchronized between primary and secondary resources. Timed wait after sync 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. Timed wait after sync ends: The system starts timing after the last synchronization finishes. After the time specified in Interval is reached, the system automatically starts data synchronization between primary and secondary resources again. Specific time policy: The system automatically synchronizes data between primary and secondary resources based on a specific time policy. NOTE: This parameter is available only when Replication Mode is set to Asynchronous.
   Interval	Indicates the synchronization interval for Timed wait after sync begins and Timed wait after sync ends. [Value range] The interval is an integer ranging from 1 to 1440 when minutes is used as the unit. The interval is an integer ranging from 10 to 86,400 when seconds is used as the unit. NOTE: This parameter is available only when Replication Mode is set to Asynchronous and Sync Method is set to Timed wait after synchronization begins or Timed wait after synchronization ends.
   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 Replication Mode is set to Asynchronous and Sync Method is set to Specific time policy.
   I/O Timeout Threshold of Secondary Resource	If data fails to be written from a primary resource to a secondary resource after the timeout, the remote replication consistency group enters the interrupted state. NOTE: This parameter is available only when Replication Mode is set to Synchronous.
   Timeout Threshold (second)	The timeout threshold ranges from 15s to 120s. NOTE: This parameter is available only when Replication Mode of the consistency group is set to Synchronous and I/O Timeout Threshold of Secondary Resource is enabled.

4. Click OK.