[Lustre-discuss] Weird behavior on lustre clients

[Andreas Dilger]

On 2010-08-08, at 16:44, Jagga Soorma wrote:
> One other piece of information.  It seems like I have found a workaround by adding a cronjob that runs every 2mins and runs a df command.  Is there some caching issue that might be caused by lustre?

Are the IO errors on NFS filesystems that have nothing to do with Lustre, or is this from NFS re-exporting of a Lustre filesystem?

>> I am experiencing some weird behavior on my lustre clients.  I have worked with Novell support and they keeping pointing to lustre as the culprit for these issues.  I am getting intermittent I/O errors when running df/ls on any nfs mounts without anything being logged in syslog.  After putting nfs and rpc in debug mode by running:
> 
> I am using all supported packages/kernels for lustre and on servers without the lustre clients installed I have no issues with nfs.  Does the interval between these errors mean anything?  
> 
> Any help would be greatly appreciated.
> 
> reshpc115:~ # uname -a
> Linux reshpc115 2.6.27.29-0.1-default #1 SMP 2009-08-15 17:53:59 +0200 x86_64 x86_64 x86_64 GNU/Linux
> reshpc115:~ # rpm -qa | grep -i lustre
> lustre-client-1.8.1.1-2.6.27.29_0.1_lustre.1.8.1.1_default
> lustre-client-modules-1.8.1.1-2.6.27.29_0.1_lustre.1.8.1.1_default
> reshpc115:~ # rpm -qa | grep -i kernel-ib
> kernel-ib-1.4.2-2.6.27.29_0.1_default


Cheers, Andreas
--
Andreas Dilger
Lustre Technical Lead
Oracle Corporation Canada Inc.