Re: kernel: nfs: server not responding,timed out

First of all, thank you for your reply.

On Wed, 18 Sep 2002 17:33:31 -0500
Doug Wyatt <[email protected]> wrote:

> 
> Mostly all I have are questions, in response to your query.
> 
> It sounds like transient network problems or perhaps a
> server-side performance issue.  You didn't say, so I'm
> assuming that this isn't only for specific files.  If it
> is could it be a size issue?  What dies 'ulimit -f' say
> on the client side?

Youre right, its not only on specific files, but one detail I have
noticed since posting, is that its always the FIRST file in the batch
that doesnt get read (due to the nfs problem)  As time goes by, and as I
think more about whats happening, I am also leaning towards transient
network problems.  As a result, we are going to rule that out of the
equation, by test running the two machines on a private network, with a
high capacity switch in place, forcing both nics and switch to 100mbps
and full duplex.  I'm sure that I will see results from this..

ulimit -f on the client returns: unlimited


> Have you tried checking the status of each copy and
> retrying the transfer?  You also referred to the seawolf-
> list posting but didn't say whether you tried what was
> suggested.

I have spoken with Arend, and have tried the things he has suggested,
which has not shed any light on the problem.  There is a difficulty with
this, being that the time of copy is often during early morning hours,
and thus cannot be monitored in great detail, other than what shows up
in the logs on each machine.

 
> Have you checked with netstat?  nfsstat? Can you run
> sar so that you could get a better picture of what is
> going on on each end of the transfer?  Can you watch
> 'top' on the server-side while transfers take place?

Forgive my ignorance, what is "sar"?  man -k sar doesnt return
anything.. ?   Also, I wouldnt know enough about the netstat and nfsstat
commands to make then work WITH me, as opposed to against me.  Are there
any suggestions you can give, with regards to arguments to pass to the
above mentioned commands, and would this need to be run/monitored at the
time of the file copy?

> 
> Is your nfs mount 'soft' or 'hard', with or without 'intr'?

Hard mounted, using export and fstab files, again excuse my ignorance,
what is intr?

Thank you for your help thus far.

Cheers,
Dan

> 
> Regards,
> Doug Wyatt
>  
> 
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> Doug Wyatt     <[email protected]>
> Sys Admin - Kohlman Systems Research, Inc.
> 319 Perry St.,  Lawrence,  KS  66044   USA
> Phone: 785-843-4099      Fax: 785-843-6459
> 
>