Workflow for storing snapshot data in consistency groups

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

Use the following process to split Thin Image Advanced pairs to store snapshot data:

1. (If the pairs are not created) Create two Thin Image Advanced pairs and assign both pairs to the same consistency group. To do this, using CCI, run the following raidcom command twice specifying -snap_mode cascade CTG to specify the consistency group ID (snapshot group name):

   raidcom add snapshot

   A pair is created and defined in a consistency group. This group is the target of the consistency group pair-split.

2. Specify the same consistency group ID (snapshot group name) as step 1 and run the raidcom add snapshot command again. A pair is added to the same consistency group. Repeat the command for the number of pairs you want to create in the same consistency group.
3. Check that all pairs in the consistency group are in the PAIR status.
4. Issue the raidcom modify snapshot -snapshot_data create command to the consistency group which is the target of consistency group pair-split. When the command is received for the Thin Image Advanced pair P-VOL in the applicable consistency group, snapshot data is stored.