[Lustre-discuss] Timeouts and Dumps

[Isaac Huang]

On Tue, Dec 23, 2008 at 06:45:09AM -0700, Denise Hummel wrote:
> Hi;
> 
> Thanks.  I have suspected the network, however have not been able to
> pinpoint the problem.  I have looked at the ethernet and infiniband
> switches - found a few with IGMP turned on and some multicast issues.
> Those have been fixed.  I am checking the network stats on the oss, mdt
> and nodes and find a few dropped packets, however the system stats do
> not indicate a heavy load during that time.  If anyone has any
> suggestions on anything else I can look at please let me know.

Turning on console logging of low-level network errors may reveal
something useful:

echo +neterror > /proc/sys/lnet/printk

Isaac