2009-04-16 07:07 AM
We have a 4Tb FAS250 with 2 aggregates using Ontap 220.127.116.11. 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.
2009-04-16 07:58 AM
try this command:
stats show volume:*:read_latency
I will refer you to this excellent article.
2009-04-27 02:50 PM
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!