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 Thin Image pairs to store snapshot data:

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

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 ID 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 CCI, run the following raidcom command:

raidcom modify snapshot -snapshot_data create

3. The storage system receives the command and 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 Thin Image pair’s P-VOL that is assigned to the consistency group.

5. The pairs are split and the snapshot data is stored.

Related concepts

• Workflow for defining Thin Image pairs and defining them in snapshot or consistency groups using Device Manager - Storage Navigator

• Notes on acquiring snapshot data