The sysstat output you provided isn't all that helpful in determining a problem. As its limited to less than 15 seconds worth of data, its hardly a look at your average performance. I would recommend increasing the interval or providing more intervals (preferrably as an text attachment) and please include column headers (I had to log into a filer and run sysstat -x to make out your output 😃 ). One thing I do note off the sysstat output it the Z CP's, but with such a short time range they may just be snapshots writing out.
You certainly don't have CPU contention based on the output, but it does look like your disks have somewhat higher util.
I would recommend upgrading ONTap as a general recommendation. I would say that adding 4 additional disks is a great first step, I feel this will be the surest route for improving your performance. As a side note, the 2020 has the smallest amount of RAM and NVRAM of all filers curently produced, don't be surprised if it gets less performance than other filers in your environment even with the same disk configuration and similar workloads, its simply can't cache the reads or writes like higher end filers can.
Curiously, you say you have 4 slots free... what do you mean by this? I'm confused because the 2020 only has 12 internal disks, combined with an additional disk shelf of 14 disks this comes to 26 disks total (not the 24 you indicated earlier.) 26 minus the 23 you have in use means you have 3 disks/slots available. Could you clarify if you have a 2020 and how many shelves you have in what configuration?
I `ll add file a bit later as i tried to turn on deduplication on volume which has Virtual machines i`m not sure if it was a good or bad idea
Sure i understand that 2020 isn`t a ferrari but i have much also fas 270 running in on of my locations and 2040C also. OK as i found out i can increase RAm to 2 GB.
About disks - i have 28 bays as previously it was 250 shelve with 14 bays in which i inserted 2020 controller and attached additional shelve which makes 24 disks( 1 spare ) i`m not sure if i typed it correctly.
Ok i will check allignment on those few machines that are running there.
what are your suggestion on upgrade ONTAp, as i read 8.x is not supported and also as we have 270 snapmirroring to 2020 it`s not a possibility.
Message was edited by: Andris Petris
Here is a file 🙂
FAS2020 and 270 will both support the latest version of ONTAP 7.3 (currently 7.3.6). I would recommend upgrading to at least 7.3.4 but as Adam S pointed out, the most important thing is probably block alignment.