[Beowulf] NFS Performance using SLES 10

[Bernard Li]

What filesystems were/are you using with CentOS and SLES?

Cheers,

Bernard 

> -----Original Message-----
> From: beowulf-bounces at beowulf.org 
> [mailto:beowulf-bounces at beowulf.org] On Behalf Of Tim Moore
> Sent: Monday, September 11, 2006 9:56
> To: beowulf at beowulf.org
> Subject: [Beowulf] NFS Performance using SLES 10
> 
> Hello All!
> 
> I have a small two-node cluster with AMD64 Opteron 
> processors.  It was 
> running Centos 4 and NFS performance was good while not hindering 
> performance.  I replaced Centos with SLES 10 about 2 weeks 
> ago and just 
> now got around to really hitting it hard submitting jobs.  Processes 
> that normally took about 15 seconds such as normal IO (each processor 
> writes its own data file) now require 10-15 minutes.  When I observed 
> the IO status, I saw that I could probably write the file by 
> hand faster 
> than the 2nd node was writing the files to the server.  I 
> would have to 
> check but I think the mobo has integrated broadcom ethernet.  I have 
> tried the usual tweaks with respect to rsize and wsize and 
> performance 
> seemed to worsen if it changed at all.
> 
> Has anyone experienced similar issues?  And/Or does anyone have 
> suggestions outside the wsize and rsize?
> 
> Thanks!
> Tim
> 
> -- 
> Timothy W. Moore
> President & Chief Scientist, Special Programs
> 
> Trident Consulting Group, Inc.
> 600 Boulevard South, Suite 106
> Huntsville, AL 35802
> 
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>