RE: Solaris NFS Client Settings?

[Stephen Gardner <stephen-rhel uk org>]

On Tue, 31 May 2005, Tim Evans wrote:

> On Tue, 31 May 2005 11:11:17 -0700, Schott, Erik J Mr ANOSC/FCBS wrote
> > Did you try adding bg, soft to the options on the Solaris clients?  The
> > default is fg, hard, which means, in a nutshell, the Solaris client will
> > continue to try the mount operation in the foreground, ad infinitum.
> >  Just a thought.
>
> Thanks.  Our problem is not failure to mount.  It's general flakiness (i.e.,
> frequent 'nfs server not responding; nfs server ok' messages, and overall
> extermely poor (i.e., modem speed) write performance.

Tim,
  A couple of quick ideas. It's worth checking the duplex settings on both 
the clients and the server. I'm not sure how far apart they are 
(topologically or in terms of end-to-end delay [latency]) but I've seen 
several high speed networks crippled by mismatched duplex settings. In 
those instances ping and interactive traffic (ie. ssh sessions) are nice 
and responsive but push the network with a streaming file transfer and the 
transfer rates fall apart

  Also I note that you have the rsize and wsize down at 1024. As an 
experiment you might want to up this to at least 8192. Although that may 
be good for transfer rates it's unlikely to help with the "not responding" 
problems which are probably caused by something like duplex mismatch, 
network saturation or even server overloading (heavy disk contention / cpu 
max'd out).

Regards,
 Stephen