Workflow for splitting Thin Image pairs in consistency groups

You can split pairs to store snapshot data for a consistency group. This process explains how to use CCI’s consistency group pair-split to split the pairs.

Use the following process to split HTI pairs to store snapshot data:

1. (If the pairs are not created) Create two HTI pairs and assign both pair to the same consistency group. To do this, using the CCI, run the following raidcom command twice using an option to specify the consistency group number:

raidcom add snapshot

A pair is created and defined in a consistency group. This group is the target of the consistency group pair-split. The consistency group number option you specified automatically enables the consistency group pair-split.

2. Create the pair to store snapshot data for a group. To do this, using the CCI, run the following raidcom command:

raidcom modify snapshot -snapshot_data create

3. The VSP G200, G400, G600 storage system receives the command. The storage system stores the snapshot data for the consistency group that is the target of the consistency group pair-split.

4. A host issues a write request to the HTI pair’s P-VOL that is assigned to the consistency group.

The pairs are split and the snapshot data is stored.

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