topic Re: How to check which volume(s) on an aggregate are busy in ONTAP Discussions

How to check which volume(s) on an aggregate are busy

pbowen — Thu, 05 Jun 2025 07:29:02 GMT

Hi Folks,

We have a 4Tb FAS250 with 2 aggregates using Ontap 7.2.6.1. How do we check which volumes are buisiest.

If this is tricky, please will you give an exampe 1st with the command(s) for a single aggregate filer.

Thanks,

Paul.

Re: How to check which volume(s) on an aggregate are busy

anthonyfeigl — Thu, 16 Apr 2009 14:58:29 GMT

Paul,

try this command:

stats show volume:*:read_latency

I will refer you to this excellent article.

http://communities.netapp.com/groups/chris-kranz-hardware-pro/blog/2009/04/01/performance-stats-without-perfstat-or-ops-mgr

Anthony feigl

Re: How to check which volume(s) on an aggregate are busy

pbowen — Thu, 16 Apr 2009 15:37:35 GMT

Thanks Anthony,

This is great stuff

Regards,

Paul.

Re: How to check which volume(s) on an aggregate are busy

amiller_1 — Sat, 25 Apr 2009 18:36:09 GMT

Although....if you do have Ops Mgr, Performance Advisor is the dead-simplest way to look at volume busi-ness.

Re: How to check which volume(s) on an aggregate are busy

chriskranz — Mon, 27 Apr 2009 21:50:52 GMT

Thanks for the plug Anthony, I owe you a beer

Another stat to check would be "total_ops" of the volume...

stats show volume:*:total_ops

If a system isn't very busy, then there may be no latency at all, so total_ops would give you how many operations (read, write and other) are happening per second during that period. However you might expect to see some traffic over volumes that aren't being used due to the filer doing some background processes. Anything above 5 operations / second is probably being used by something external to the filer.

If you are looking to cover your back before deleting a volume, always offline it and leave it for a short period (maybe a few days) so you can be sure that the volume isn't going to be missed!