Modifying Properties of a Remote Replication Pair

Precautions

The properties of a remote replication pair which has been added to a consistency group cannot be modified.

Procedure

1. Choose Data Protection > Protection Entity > Volume > Remote Replication Pair.
2. Click More on the right of a desired remote replication pair and select Modify.

   The Modify Remote Replication Pair page is displayed on the right.

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

   Table 1 Remote replication pair parameters

   Parameter	Description
   Speed	Data synchronization speed of the remote replication pair. 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 load is heavy, the recommended rate is 0 MB/s to 20 MB/s. During incremental synchronization, if the service load is relatively 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	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	Data synchronization mode of the 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. After the time specified in Interval is reached, the system automatically starts data synchronization between primary and secondary resources again. NOTE: If the last synchronization has not finished after the time specified in Interval is reached, the system performs the next synchronization after the last 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	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 sync begins or Timed wait after sync ends.
   Time Policy	Specific 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 on the primary resource fails to be written to the secondary resource after the timeout threshold, the remote replication pair enters the disconnected 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 pair is set to Synchronous and I/O Timeout Threshold of Secondary Resource is enabled.

4. Click OK.