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xen-users
Re: [Xen-users] Xen reboots on dom-U disk stress...
Yes, spot on, it was running out of page space in dom-0 after which
Linux seemed to go on a process killing spree before turning the gun on
itself and rebooting. Not very pretty.
And yes, NFS + loopback looks particularly ugly. I got it to finally run
with 1G in dom-0!
We're trying GNDB, iSCSI et al... (any preferences?)
Thanks
Roland
Mark Williamson wrote:
How much memory does dom0 have? I believe NFS + loopback files is very prone
to out-of-memory problems so it seems most likely your dom0 died.
If you hook up a serial line, you might be able to get some useful output
before it dies.
Had you considered using something like GNBD instead of NFS + loopback? It
should perform better and be less prone to OOM problems.
Cheers,
Mark
On Wednesday 11 May 2005 08:36, Roland Paterson-Jones wrote:
Hi all
I tried to run bonnie++ disk stresser in dom-U, who's disk is backed
with non-local (on nfs) loop-back file.
The machine rebooted pretty quickly.
So, how do I tell what's barfing? Is it Xen? Is it dom-0 (nfs or
loop-back)?
I looked in dom-0's /var/log/messages and didn't see any obvious record
of a dom-0 whoopsie (but is that the right place to look etc...).
Any help greatfully received.
Incidently, I ran bonnie++ successfully in dom-U with disk backed by
local (dom-0 ext3) loop-back file. This pleasantly surprised me, as
loop-back files don't have a good rep for stability under load.
Regards
Roland
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