Splitting a Remote Replication Pair
This section describes how to split a remote replication pair if you want to enable secondary resources to save data in primary resources at a specific point in time, interrupt the remote replication link for maintenance, or expand the network bandwidth. After a remote replication pair is split, data written to the primary resource by the application server will not be synchronized to the secondary resource. This may cause data inconsistency between primary and secondary resources.
Prerequisites
- The remote replication pair to be split has not been added to a CG.
- Running Status of the remote replication pair helps you determine whether the remote replication pair can be split, as shown in Table 5-4.
Table 5-4 Status requirements for splitting a remote replication pair
Running Status of a Remote Replication Pair
Pair Splitting Supported or Not (Synchronous Remote Replication)
Pair Splitting Supported or Not (Asynchronous Remote Replication)
Normal
√
√
Split
√
√
Interrupted (link down)
√ (can be performed only on the primary storage system.)
√ (can be performed only on the primary storage system.)
Interrupted (link up)
√
√
To be recovered
√
√
Synchronizing
√
√
Invalid
×
×
√: Supported
×: Not supported
Procedure
- Choose Data Protection > Protection Entities > LUNs > Remote Replication Pairs.
- Select the desired remote replication pair and click Split.Confirm your operation as prompted.
Alternatively, perform any of the following operations to split a remote replication pair:
- Click More on the right of the desired remote replication pair and select Split.
- Click the name of the desired remote replication pair. In the upper right corner of the page that is displayed, click Operation and select Split.
- Choose Services > Block Service > LUNs. Click the name of the desired LUN. On the page that is displayed on the right, click the Protection tab, and then select Remote Replication from the drop-down list. Select the desired remote replication pair and click Split.
- Choose Data Protection > Protection Entities > LUNs > LUNs.
- Click the name of the desired LUN. On the page that is displayed on the right, click the Protection tab, and then select Remote Replication from the drop-down list. Select the desired remote replication pair and click Split.
- If the value of Remote Replication Pairs is not 0, click the value. Select the desired remote replication pair and click Split.
