What to do when 3par storage used capacity is almost full: Part 1 - compactcpg

[sbhat09]

As the hosts continuously write and remove data on different sections of the disks, there may be some unutilized space on the disks. You can realign the used disk space of a CPG with compactcpg command. This command will consolidate the logical disks (LDs) into as few LDs as possible. The system will reclaim the unused LDs space.

compactcpg provides dry run option to estimate the reclaimable free space before actually executing it. You can run 'compactcpg -dr <cpg_name>' to estimate the amount of free space you can squeeze. For compactcpg execution, run 'compactcpg <cpg_name>'.

From GUI, you can select the CPG, go to Actions and select 'Compact'. You can schedule compactcpg as well.

 Note: Before initiating compactcpg, make sure there are no AO data movements or tunesys tasks are running simultaneously. If multiple data movement tasks (AO, tunesys and compactcpg) running at the same time, each task will take exponentially longer duration to complete.

If there are no such compactable LDs, then compactcpg will not help much.

Regards,
Srinivas Bhat

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Note: All of my comments are my own and are not any official representation of HPE.