It only lasts for a couple of minutes. I've set up an alert in DFM to kick of a script to start perfstat when latency exceeds 20ms. Hopefully that will do the trick.
Thanks, Marcus
-----Original Message----- From: Jack Lyons [mailto:jack1729@gmail.com] Sent: den 29 juli 2012 12:42 To: Nilsson Marcus; toasters-bounces@teaparty.net; tmac; alonz Cc: toasters@teaparty.net Subject: Re: Ontap 8.1 performance issue
How long do the spikes last?
I think with dfm you can set an alert based on latency and email an operator to kick off a perfstat.
Jack Sent from my Verizon Wireless BlackBerry
-----Original Message----- From: Nilsson Marcus marcus.nilsson@atea.se Sender: toasters-bounces@teaparty.net Date: Sun, 29 Jul 2012 07:48:25 To: tmactmacmd@gmail.com; alonzalonz@emet.co.il Cc: toasters@teaparty.nettoasters@teaparty.net Subject: RE: Ontap 8.1 performance issue
Hi, I have a 3210 single controller system with intermittent latency spikes. The system has 48 x 3 TB disks. We went with ONTAP 8.1 to utilize big aggregates. Two aggregates has been created, one with 16 disk and another with 31 disk. The latency spikes affect volumes from both aggregates (at the same time). It's a CIFS only system running SMB2.
Upgrading to ONTAP 8.1P2 has not resolved the latency spikes on this system, see screenshot from DFM: http://i.imgur.com/TAXvl.png
I have not tried 8.1.1RC1. Disk utilization is not peaking.
I have an open support ticket with NetApp, they want me to capture a perfstat log during the latency spikes. This has proven difficult since the spikes are so intermittent.
Any suggestions on how to track this down are welcome.
Thanks, Marcus
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of tmac Sent: den 26 juli 2012 23:00 To: alonz Cc: toasters@teaparty.net Subject: Re: Ontap 8.1 performance issue
Looks like 8.1P2 was just released in the last 24 hours.. On Jul 26, 2012 4:47 PM, "Alon Zeltser" alonz@emet.co.il wrote:
-------- Original message -------- Subject:RE: Ontap 8.1 performance issue From:Alon Zeltser alonz@emet.co.il To:"Klise, Steve" klises@sutterhealth.org Cc:
Yes this include p1 according to netapp support this should be fixed at p2 schedule to be released at end of the month
Sent from Samsung Mobile"Klise, Steve" klises@sutterhealth.org wrote:
Was this noticed also on 8.1p1? Looks like there were some good fixes in the p release.
Thanks in advance.
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Alon Zeltser Sent: Thursday, July 26, 2012 11:01 AM To: toasters@teaparty.net Subject: Ontap 8.1 performance issue
Hi all As a netapp ASP I spent quite alot of my time installing netapp's at costumers site and resolving their issues and I wanted to share my recent experience with 8.1 Usually I try to avoid RC release but until recently the fas22xx didn't gave us much choice Once the 8.1 GA released I felt more free to install this release. but after I started to get performance complains from my costumers I wasn't so sure After investigating some of the complains I felt that they are justified something is off in system I can't put my finger on it but its looks the system don't perform as expected even though the system don't look busy. After opening support cases at netapp one of the engineers told me that they also gets alot of performance cases with this release an even though he can't find a bug that feets with our logs and perfstat he recommend upgrade to 8.1.1rc1 Following his advise after upgrade I saw major performance improvment I mean throughput went up from 70-80 MB/s to 250-300 MB/s and latency also went down The same result occurred on more then one 8.1 system after upgrade to 8.1.1rc1 I saw at least 50% improvment in throughput Today on new system I install I completely skip th GA version an go straight to 8.1.1rc1 So my advice if you on this release and suffering from performance and don't know if you have enough disks or the right controller upgrade first then check
Sent from Samsung Mobile
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