Need Advice for Tuning NFS to place nice with a Netapp

[N. Harrington]

 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. 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
 
 I have tried plenty of others. 

 an example nfsstat -c 2  (while working ok)
GtAttr Lookup Rdlink   Read  Write Rename Access 
Rddir
 4357   2976      0    125      0      0   3425      0
 4173   2836      0    115      0      0   3288      0
 4254   2912      0    106      0      0   3344      0
 3668   2528      0     99      0      0   2880      0
 3992   2746      0    101      0      0   3136      0
 3916   2706      0     93      0      0   3080      0
 3748   2551      0    106      0      0   2948      0
 4121   2851      0     86      0      0   3231      0

 Any advice for sysctl tunes or anything else would be
much appreciatted!

 Thanks

  Nicole

 

The Large Print Giveth And The Small Print Taketh Away
 -- Anon

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