NFS is too slow

[Hrvoje Dubravica]

Hi,

I have B.10.20 version of OS and NFS v2.
I wounder if there is any chance to increase
perfomance of NFS.
Currently nfsd is 16.
I wounder if there is any patch for NFS v2 or is there
any chance to install NFS v3

Thank you in advanced

Hrvoje

[Tommy Palo]

The document:
"HP-UX Kernel Tuning and Performance Guide"
which can be found on various sites eg.
http://www.uwsg.indiana.edu/hp/hpux-tune.html
discusses various aspects on performance tuning were NFS is one.

[Andreas Voss]

Hi,

NFS V3 can be obtained via patch install.
Look at this previous thread:
http://my1.itrc.hp.com/cm/QuestionAnswer/1,1150,0x1d67c5ea0230d411ade80090279cd0f9,00.html
Of course the patch can be superseeded, check it at the patch database.

Regards

[Hrvoje Dubravica]

Hi everyone,

I read your messages. Thank you.
But I cann't visit pages you recommend me.

So, if you know any other way to get
those information, please be free contact me.

Thank you,

Hrvoje

[Andreas Voss]

Hi,

try to load the patch PHNE_22117
thats the NFS Kernel General Rel & Perf Patch which includes NFS V3
After installation you have to edit the /etc/rc.confid.d/nfsconf where there are new variables which controlls the NFS behavior:
MOUNTD_VER=(2|3)
also you can enable the new automount feature with:
AUTOFS=1

If you don't see these new variables take a look at /usr/newconfig/etc/rc.config.d/nfsconf

Regards

[Bill Hassell]

NFS performance is influenced by very many factors. You may need to increase the number of biods or nfsd daemons...it depends on which NFS feature you are using (client or server).

Start by reading the man pages for nfsstat and netstat. Try netstat - udp and look for socket overflows which means more daemons are needed. If the network stats look fairly reasonable, then it's important to keep high speed LANs in perspective: they are never going to be as fast as a disk and they are a party line so every connection to the same network is a potential bottleneck.

For example, a 100 Mbit LAN can reliably support 30 Mbit throughput longterm which is about 3-4 Mbytes/sec, way slower than average disks. There is no simple answers as long as there are multiple machines on the same network.