* May want to check for alignment of your vm's. If you have virtual storage console installed, its under monitor/host config, and tools. Check it out.
* Could be a reallocate issue if you have added a bunch of disks, but is doubtful.
DFM is a used mostly for reporting among other things, but I use it primarily for reporting/protection manager, etc. The Netapp Management Console is your friend. That is the live view or a more "accurate" view of what is currently going on, with the ability to go back in time. DFM is just going to show an average, and is not (IMHO) a good place to look for performance numbers.. Perfstat is the real ticket; that will show you console activity.
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Philbert Rupkins Sent: Tuesday, May 21, 2013 2:19 PM To: toasters@teaparty.net Subject: VM Virtual Disk Latency Versus NFS Latency on Filer
Hello,
This may be more of a VMWare question. From within Data Fabric Manager, I am seeing a spike in latency on a NetApp volume used as an NFS datastore. DFM shows a spike in NFS latency of 50 ms on the volume.
However, a virtual machine's performance counters in vSphere show a spike in Virtual Disk latency upwards of 700ms for the same "latency event".
Any idea what might account for this difference in latency reporting between the NetApp (DFM) and ESXi? I expected there to be some difference for obvious reasons but I didnt expect to see a difference of this magnitude.
Thanks, Phil