[Lustre-discuss] lustre 1.6.7.2 client kernel panic

[Bernd Schubert]

On Tuesday 22 December 2009, David Dillow wrote:
> On Tue, 2009-12-22 at 18:09 +0100, Bernd Schubert wrote:
> > On Tuesday 22 December 2009, Nick Jennings wrote:
> > > On 12/21/2009 07:36 PM, Brian J. Murrell wrote:
> > > > Photographs of 25 line console screens are not very often suitable
> > > > substitutes for real console logging, unfortunately.  Seriously, if
> > > > you really want to pursue this issue, you are going to have to set up
> > > > some form of console logging.  I think netconsole is usually fairly
> > > > successful at capturing kernel oops dumps.  Maybe that's an option.
> > > > ISTR mentioning netconsole the last time though.  Maybe that was
> > > > another thread.
> > >
> > >  You're right, I just hadn't gotten around to getting netconsole set up
> > > like I planned. *blush* :)
> >
> > Most servers nowadays have IPMI and an IPMI SOL is much better.
> 
> Heh, I'd like to know what servers you are running. Our experience with
> IPMI SOL on a variety of systems has been anything but reliable. It has
> a notorious habit of dropping out under any sort of load, such as during
> an oops where you need it the most.
> 
> It's still better than nothing, but it's a crapshoot.
> 

Yes, I know about IPMI issues, of course. In my experience, SuperMicro IPMI 
with an additional NIC port works perfectly. I don't know about their most 
recent mainboards and BMCs, though. The first week I started for DDN I learned 
that Dell-DRAC5 has a bug and does not send a break (sysrq). According to 
Dell, this is fixed in their recent firmware released 7 days ago (I opened the 
'priority' call on March 6th), but I could not check yet. 
Also working rather well is HP ilO, although not with SOL, but their build in 
"vsp". The problem with vsp is that cursor-keys do not work and navigating 
through the grub-menu is a pain, unless you know emacs shortcuts in and out 
(I'm a vi user...).


Cheers,
Bernd

-- 
Bernd Schubert
DataDirect Networks