what nfs mount options and version of nfs with hpux10.2

[Steve Post]

I have an old HP9000 running as a client to nfs mount a file system from a hpux11 server.

It is having a little bit of trouble because of occasional network loads between the two machines.

Through the web sites here (and the man pages), I have NOT found answers to these 2 questions....so I guess I'll ask them here.

1. How can I tell what version of NFS I am running? There was a lot of talk about version 2 vs 3.
2. What are the mount options for an NFS mount, that I would put into the /etc/fstab file? (one document said to use "timeo", but I would like to see documentation on it.

That's it. Thanks if you can help.
STeve ^_^

[Mark Greene_1]

I ran the following:
strings /usr/sbin/nfsd|grep 2
):$Revision: 92453-07 linker linker crt0.o B.10.60 970821 $
@(#)nfsd daemon PHNE_22642
0123456789abcdef

doing a search on PHNE_22642 on hp's site ultimately lead me to this:

http://us-support3.external.hp.com/wpsl/bin/doc.pl/screen=wpslDisplayPatch/sid=587d7d3e1701f591ae?PACH_NAM=PHNE_24909&HW=s800&OS=11.00

which appears to be the latest patch for nfsd for 11.00, so you may want to give loading this a shot and see if your nfs performance does not improve.

--
mark

[Tom Dawson]

This is a /etc/fstab example from one of our 10.20 servers that mount a nfs drive exported from another 10.20 server:

flo1q01.mydomain.com:/nfs_flo1q02_a /u5 nfs rw,suid 0 0

"/u5" has an Oracle db file on it so we don't try to do any timeouts.

I think I saw somewhere that the nfs that comes with 10.20 is version 3, but I wouldn't bet my paycheck on it.

[Uday_S_Ankolekar]

Hi,

On client nfsstat -m will show the NFS version for each mount point.

On server rpcinfo -p|egrep "service|nfs" will show the available NFS
versions.

mount -p would show you timeo option.

here is the doc..

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=adfe960a0a8a51fdb2/screen=ckiDisplayDocument?docId=200000006445114

Goodluck

-USA..

[Uday_S_Ankolekar]

Hi,

Some more info on timeo...

timeo=n The value in tenths of a second before
sending the first retransmission after an
RPC timeout. The default value is 7 tenths
of a second. After the first timeout
the
timeout is doubled after each successive
timeout until a maximum timeout of 60 sec-
onds is reached or the enough retransmis-
sions have occured to cause a major time-
out. Then
if the filesystem is hard
mounted
each new timeout cascade restarts
at twice the initial value of the previous
cascade
again doubling at each retransmis-
sion. The maximum timeout is always 60
seconds. Better overall performance may be
achieved by increasing the timeout when
mounting on a busy network
to a slow
server
or through several routers or gate-
ways.

-USA..

[Sanjay_6]

Hi Steve,

Check the links below to find out about the NFS version.

http://us-support.external.hp.com/cki/bin/doc.pl/sid=f992083f123087743b/screen=ckiDisplayDocument?docId=200000012180447

http://us-support.external.hp.com/cki/bin/doc.pl/sid=f992083f123087743b/screen=ckiDisplayDocument?docId=200000047257369

Hope this helps.

Regds

[Steve Post]

Mark, I ran strings "/usr/sbin/nfsd | grep 2"
I got a lot of numbers and versions. But no NFS version 2 or 3. I did not get a patch listed. But I am not allowed to load patches on this klunker anyway.

Tom, I also looked at /etc/fstab. I didn't see any timeout options either.

U.S.A,
nfsstat -m shows nothing. I bet my software here is too old.
rpcinfo -p | egrep "service|nfs" shows nothing either. ....Old.
mount -p shows the nfs mount is taking "defaults" But I don't know the defaults (or the options).
OLD OLD OLD software. ;)
So far what I would do is:
unmount /spot2
vi /etc/fstab
server:/spot1 /spot2 nfs rw,suid,timeo=50 0 0

And hope this fixes the timeout problem. But, I'm not going to do that until I can really find the options and defaults for THIS version of NFS.
On a simple ping, I can see delays of up to .9 seconds (900 milliseconds).

[Sanjay_6 · Accepted solution]

Hi Steve,

check out this link from hp doc site for the various nfs mount options,

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B1031-90048/B1031-90048_top.html&con=/hpux/onlinedocs/B1031-90048/00/00/9-con.html&toc=/hpux/onlinedocs/B1031-90048/00/00/9-toc.html&searchterms=NFS%20mount%20options&queryid=20011227-131401

Here is a link from itrc to diagnose nfs problems,

http://us-support.external.hp.com/cki/bin/doc.pl/sid=854d57950c2d6ddbe5/screen=ckiDisplayDocument?docId=200000056243682

Hope this helps.

Regds

[Steve Post]

ok Sanjay. I ran "rpcinfo -u nfs 2"
No response
I ran "rpcinfo -u nfs 3"
No response.
I ran "ps -ef | grep nfs "
No response.
....I scratched my head. You see the disk has been nfs mounted since last August. Obviously nfs is running. Something's a little odd there. I'll have to dig into it.

So I looked at the nfs options. Those are good. Then (20-20 hindsight) I went to sam, so see if these options are there. They are.
Ok. Using sam, I changed the timeo option from 7 to 21. I see it changed the /etc/fstab file. Before I made the change, I verified no processes were running on /spot2 just in case sam tries to unmount it.

I printed out all of the information. I'll dig into it all. Thanks. I don't know if my problem is solved. But at least I have documentation that may help.

STeve

[Sanjay_6]

Hi Steve,

Try,

rpcinfo -p host_name |grep nfs

If the result shows,
100003 2 UDP 2049 nfs
100003 3 UDP 2049 nfs

Then you are running both version 2 and 3 of nfs.

Hope this helps.

Regds

[Steve Post]

Nope.
I have these things running....
portmapper,status,nlockmgr,llockmgr,cmsd, and ttdbserver.
I bet one of these is the nfs (since it's working). This is an old box. Like circa 1992.

In the meantime, I saw that the nfs mount had about 4000 timeout errors since the last reboot (about 3 weeks ago). I got 100 nfs errors in the syslog.log since last reboot. I know how to fix it if it happens again. But I'm hoping that timeo variable will fix it.

Apparently when people send huge emails, etc over this network connection, the nfs mount suffers. I wouldn't mind it suffering as long as it does not get stuck.
Thanks for you help. ^_^