Op 16 jan. 2013 om 18:00 heeft Sage Weil <sage@xxxxxxxxxxx> het volgende geschreven:
> 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.
>
I don't think he uses Qemu. From what I understand he uses kernel RBD since he uses the words 'map' and 'unmap'
Wido
> 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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