It used to just be a “stats show –i
<minutes>” but it may be something from the Java API now, I’m
not sure. Stats show still works and can provide the same information, getting
it to write out is a little confusing.
Frankly it’s disappointing that
NetApp has emphasized support on the thicker method for performance monitoring,
SNMP + SSH worked well when you have dozens or more filers to handle. We don’t
have a common directory so creating a single local ID with a ssh key is much
easier for us from a management point of view.
Too bad Ontap’s command line makes
AIX look good L
From: Fred Grieco
[mailto:fredgrieco@yahoo.com]
Sent: Monday, January 31, 2011
12:51 PM
To:
Subject: Re: latency measurement
in DFM/Management Console/etc
Thanks, this makes
sense. But...
The graph seems to roll along at 1 minute intervals. This is in
"Management Console" which I assume is also called Performance
Advisor. The default interval for this in DFM though is 5 minutes
(perfAdvisorPollInterval). Is there some other setting for this?
From: "
To: Fred Grieco
<fredgrieco@yahoo.com>; toasters@mathworks.com
Sent: Mon, January 31, 2011
8:54:18 AM
Subject: RE: latency measurement
in DFM/Management Console/etc
Frequently this is from too short of a
sample period.
______________________________________________________________________________________________________________________________________________________
* email:Jeremy.Page@gilbarco.com| Servers and Storage
| Gilbarco Veeder-Root
( phone: 336.547.5399 | ( cell:
336.601.7274 | 6 fax: 336.547.5163
From:
owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Fred Grieco
Sent: Monday, January 31, 2011
8:44 AM
To: toasters@mathworks.com
Subject: latency measurement in
DFM/Management Console/etc
How does the
Netapp or DFM measure volume and lun latency? Does it just measure how
long it's taking to service requests from the back ports to the front
ports? Or does it measure some sort of fibre ping to the host?
I am looking in the management console in DFM/Ops Mgr and seeing spikes of very
high volume and lun latency (seconds...) on an N-Series IBM gateway
filer. I've looked at all the usual suspects, including misaligned VMs,
high correlated IOPs, delays on the backend disk, deferred consistency
points. Nothing is matching up. Most of the connected systems are
on a Cisco UCS with NPIV. The systems with the lowest IOs have the
highest latency numbers.
Thoughts?
TIA,
Fred
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