On Wed, 16 Jan 2013, Wido den Hollander wrote:
>
> On 01/16/2013 11:50 AM, Marcin Szukala wrote:
> > Hi all,
> >
> > Any ideas how can I resolve my issue? Or where the problem is?
> >
> > Let me describe the issue.
> > Host boots up and maps RBD image with XFS filesystems
> > Host mounts the filesystems from the RBD image
> > Host starts to write data to the mounted filesystems
> > Host experiences power failure
> > Host comes up and map the RBD image
> > Host mounts the filesystems from the RBD image
> > All data from all filesystems is lost
> > Host is able to use the filesystems with no problems.
> >
> > Filesystem is XFS, no errors on filesystem,
> >
>
> That simply does not make sense to me. How can all data be gone and the FS
> just mount cleanly.
>
> Can you try to format the RBD with EXT4 and see if that makes any difference.
>
> Could you also try to run a "sync" prior to pulling the power from the host to
> see if that makes any difference.
A few other quick questions:
What version of qemu and librbd are you using? What is the command line
that is used to start the VM? This could be a problem with the qemu
and librbd caching configuration.
Thanks!
sage
>
> Wido
>
> > Kernel 3.5.0-19-generic
> >
> > root@openstack-1:/etc/init# ceph -s
> > health HEALTH_OK
> > monmap e1: 3 mons at
> > {a=10.3.82.102:6789/0,b=10.3.82.103:6789/0,d=10.3.82.105:6789/0},
> > election epoch 10, quorum 0,1,2 a,b,d
> > osdmap e132: 56 osds: 56 up, 56 in
> > pgmap v87165: 13744 pgs: 13744 active+clean; 52727 MB data, 102 GB
> > used, 52028 GB / 52131 GB avail
> > mdsmap e1: 0/0/1 up
> >
> > Regards,
> > Marcin
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