[Lustre-discuss] More newbie issues

[Robin Humble]

On Fri, Jul 25, 2008 at 05:22:56PM -0400, Robert Healey wrote:
>Greetings.  I managed to work around the problem I was having with
> >> Except from dmesg:
> >> Jul 17 16:32:42 compute-4-10 kernel: LustreError:
> >> 3834:0:(ldlm_lock.c:430:__ldlm_handle2lock()) 
> >ASSERTION(lock->l_resource
> >> != NULL)
> >> failed
> >This looks like bug 15269.
>by moving from RHEL 5.2 on a v20z to RHEL 4.6 on Thumper, ran into a 
>different problem which appears to be a deal breaker for me.  I forcibly 
>failed one of the drives in the raid-1 mirror for the MDT and the file 
>system promptly stopped responding to clients.  The rest of the machine 
>worked just fine.  A reboot of both the client + server cleared the 

md doing failover shouldn't hang or stop anything. pulling disks on md
raid5 and raid1's has worked fine for me in the past.

what does /proc/mdstat look like? dmesg?
how did you forcibly fail the disk?

>problem.  Its looking like Solaris/ZFS might be a better answer for me.

they're not really comparable filesystems.
or do you mean you'll use Lustre's ZFS on OSS's? I didn't think that
was available yet...

cheers,
robin