I'm trying to test some monitoring scripts I have for filers and would like to know if there's a way to artificially increase the CPU load on a filer. I don't have very many clients to generate load with, so if there's some way to do this from the console of a filer, that's even better. Thanks for your help.
I'm trying to test some monitoring scripts I have for filers and would like to know if there's a way to artificially increase the CPU load on a filer. I don't have very many clients to generate load with, so if there's some way to do this from the console of a filer, that's even better. Thanks for your help.
"snap list" on our F820 raised CPU usage from about 5% to over 20% for almost a minute. We have about 20 snapshots on a 500G volume. Creating and deleting snapshots also causes higher CPU load for several seconds.
If you are using quotas, then "quota on volname" (after quota off) can use a lot of CPU on a large volume.
You could also run a disk scrub with "disk scrub start".
Steve Losen scl@virginia.edu phone: 434-924-0640
University of Virginia ITC Unix Support
Steve Losen writes:
"snap list" on our F820 raised CPU usage from about 5% to over 20% for almost a minute. We have about 20 snapshots on a 500G volume.
"snap list" is _much_ faster in recent ONTAP releases (e.g. 6.2.2). It doesn't seem to do any disc I/O at all nowadays.
We have about 20 snapshots on a 500G volume. Creatingand deleting snapshots also causes higher CPU load for several seconds.
And disk I/O as well: that's still true. Though not as much as pre-6.0, of course.
Chris Thompson Email: cet1 [at] cam.ac.uk
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Chris Thompson -
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Steve Losen