Need Advice for Tuning NFS to place nice with a Netapp
Freminlins
freminlins at gmail.com
Wed Aug 2 13:09:26 UTC 2006
Nicole,
On 02/08/06, N. Harrington <drumslayer2 at yahoo.com> wrote:
>
> Hi
> I have several web servers that are attached to a
> Netapp (network appliance) unit via NFS-3. A few
> servers are 5.5 and a few are 6.1 for comparison
> testing. All seem to have lousy performance.
We have a similar setup and it runs smoothly.
Can you define "lousy performance" ?
Can you give more details on your network? Are you using Gig ethernet? And
over what medium?
Can you also try just copying a 100MB file from the filer to one of the web
servers and record the time?
Are you running nfsiod?
When
> going through the issues with Netapp, the reasons
> given were that we have too many GettAdr/Lookup
> requests compared to actual reads. So all the NFS IOPS
> are being used up by these requests. As soon as the
> webservers get busy, requests pile up.
>
> I have tried everything I can think of. The web
> servers are even mounted read only with no help.
>
> My current mount options are:
> filer:/vol/fvol31 /home/13/13 nfs
> ro,noatime,-r=32768,-T,-b,-R0,-i,-D2,-L 0 0
Mounting noatime for web servers is a good idea but... your "noatime" option
has no effect on NFS mounts (check out the mount man page). You need "vol
options no_atime_update" on the NetApp.
Any advice for sysctl tunes or anything else would be
> much appreciatted!
>
> Thanks
>
> Nicole
>
One last thing - are you female?! In a UNIX newsgroup?!
Frem.
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