This operation enables you to split a remote replication task if you want to enable secondary resources to save the data of 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, the data written to primary resources 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 that you want to split has not been added to a consistency group.
- Running Status of the remote replication pair supports splitting. Table 1 shows in which status a remote replication pair can be split.
Table 1 Status requirements for splitting a remote replication pair Running Status of a Remote Replication Pair
Pair Splitting Supported or Not (Async Remote Replication)
Pair Splitting Supported or Not (Sync 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
Precautions
If the initial synchronization of a remote replication pair is not completed, splitting the remote replication pair may cause the unavailability of secondary resources. Therefore, exercise caution when performing this operation.
Procedure
- Choose Data Protection > Protection Entity > Volume > Remote Replication Pair.
- Select one or more desired remote replication pairs and click Split.
You can also click More on the right of a desired remote replication pair and select Split.
- Confirm your operation as prompted.