Viewing Remote Replication Pairs

Context

• On the remote replication pair management page, you can click to refresh remote replication user information.
• On the remote replication pair management page, you can click or next to a parameter and enter a keyword or select a parameter value to search for the required remote replication pair information.
• On the remote replication pair management page, you can click to select the remote replication pair parameters you want to view.

Procedure

1. Choose Data Protection > Protection Entity > Namespace > Remote Replication Pair.
2. Select an account from the Account drop-down list in the upper left corner.
3. View information about an existing remote replication pair. Table 1 describes related parameters.

   Table 1 Remote replication pair parameters

   Parameter	Description
   Local Resource	Indicates the name of a local resource.
   Remote Resource	Indicates the name of a remote resource.
   ID	Indicates the ID of a remote replication pair.
   Remote Device Name	Indicates the name of the remote device.
   Remote Device ESN	Indicates the ESN of the remote device.
   Local Resource Role	Indicates whether the local resource of the remote replication pair is the primary resource. If local resources are primary resources, it displays as Primary. Otherwise, it displays as Secondary.
   Health Status	Indicates whether the remote replication pair is functioning normally. Possible values are as follows: Normal: The pair is functioning normally. You can perform the synchronization operation. Fault: The primary resource or secondary resource of the pair malfunctions or the replication link is down. Therefore, you cannot perform the synchronization operation.
   Running Status	Indicates whether the remote replication pair is running properly. Possible values are as follows: Normal: indicates that the data synchronization of the pair is completed successfully. Synchronizing: indicates that the data of the pair is being synchronized. Split: indicates that the pair is in the split status, and the synchronization is suspended. Interrupted: indicates that the remote replication internal I/O error or the replication link is down, and you cannot perform the synchronization operation temporarily. To be recovered: indicates that after the faulty internal I/Os of the remote replication are rectified or the replication link is up, and if Recovery Policy is Manual, the pair is to be recovered. You need to manually start data synchronization for the pair. Invalid: indicates that the pair is unusable and cannot be restored in this status, except deleting it. You must delete the pair on both primary and secondary storage devices. Otherwise, the pair creation may fail.
   Replication Mode	Indicates the data replication mode. Asynchronous: After data is written to primary resources successfully, the host receives a write success response. Meanwhile, the primary site records differences between the written data and the secondary resource data. Then the changed data recorded by the primary site is synchronized to the secondary site, minimizing the write latency for foreground applications.
   Recovery Policy	Determines how data is synchronized after an internal I/O error or a replication link fault is rectified. The default value is Automatic. [Value range] Automatic: The system automatically synchronizes data. The pair enters the Synchronizing state. Manual: Data must be synchronized manually. The pair enters the To be recovered state.
   Speed	Indicates the data synchronization speed of a remote replication pair. The value ranges from 1 MB/s to 10,240 MB/s (or 1024 KB/s to 10,485,760 KB/s).
   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 after the last 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.
   Interval	Indicates the synchronization interval for Timed wait after sync begins and Timed wait after sync ends. NOTE: This parameter is available only when Sync Type 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. NOTE: This parameter is available only when Sync Type is set to Specific time policy.
   Primary Resource Data Status	Indicates status of data in the primary resource. Data in the primary resource is always in the Consistent status.
   Secondary Resource Data Status	Indicates the status of the secondary resource. Consistent: Data in the secondary resource is a copy of the data in the primary resource (at the time when the latest successful synchronization starts). At this time, data in the secondary resource is available but not necessarily the same as the current data in the primary resource. Inconsistent: Data in the secondary resource is not a copy of the data in the primary resource (at the current point in time or at the time when the previous synchronization ends). In this state, data in the secondary resource is unavailable. You can synchronize the data to ensure data consistency between primary and secondary resources.
   Status of Secondary Resource Protection	Indicates status of secondary resource protection. Read/Write: Data on the secondary resource can be read and written. Access prohibited: Data on the secondary resource cannot be accessed, ensuring data security of the secondary resource.