2013-05-07 07:38 AM
we have a NetApp Filer and i see a lot of IOPS on both controllers. Using Management Console, i was already able to narrow it down to specific volumes which are NFS Exports.
When i look at the performance statistics, it shows about 15k IOPS on average constantly. Using Management Console, it shows as all of them as 'nfs_other_ops'. I'm wondering where they come from and if i can narrow it down further...
We run OnTAP 8.0.2 (plan to upgrade to 8.1.1 in the next few weeks).
thanks a lot!
2013-05-07 08:00 AM
you could enable nfs per client stats (options nfs.per_client_stats.enable on) to see where those iops come from (nfsstat -h or nfsstat -l).
On a personal note, go for ONTAP 8.0.5 instead of 8.1.2 ...
2013-05-08 12:31 AM
i found the hosts with this command. It were some ESXi hosts that were doing massive amounts of 'Lookup' operations (even though nothing is being done over NFS from that ESXi host). I have opened a case with VMware.
The other hosts are RHEL which are doing 'getattr' and 'access', again by a massive amount. Our Linux guys are investigating those hosts.
2013-05-28 01:05 AM
just a quick note,
When I could not run the 'nfsstat -l' since it has a vfiler enabled.
hence, I needed to run the below command instead :
vfiler run vfiler0 nfsstat -l, which resulted in -
10.10.97.157 <hostname unknown> NFSOPS = 30013399682 (100%)
10.10.97.217 <hostname unknown> NFSOPS = 27522169102 (100%)
does anyone knows if this is an aggregated value of all Ops done by this client since the stats where zeroed?