Re: Random blocks when accessing rbd images

[Samuel Just <sam.just@xxxxxxxxxxxxx>]

'ceph pg dump' will tell you the status (active/clean/scrubbing/etc)
for each pg.  Does the same pg remain in state active+clean+scrubbing
for more than 10 minutes?
-Sam

On Thu, Dec 15, 2011 at 7:45 AM, Guido Winkelmann
<guido-ceph@xxxxxxxxxxxxxxxxx> wrote:
> Am Donnerstag, 15. Dezember 2011, 17:32:25 schrieben Sie:
>> On 12/15/2011 05:07 PM, Guido Winkelmann wrote:
>> > Hi,
>> >
>> > I've got a small ceph cluster with one mon, one mds and two osds (all on
>> > the same machine, for now), that I want to use as a block- and file
>> > storage backend for qemu machine virtualisation.
>> >
>> > I found that read access to some of the rbd images, or parts of some of
>> > them sometimes blocks indefinitely, usually after the image has been
>> > sitting around untouched for a while, for example over night. This has
>> > the effect that virtual machines that try to access their disks as well
>> > as rbd commands like "rbd cp" will just hang indefinitely.
>> >
>> >  I found that these blocks can usually be "fixed" by restarting one of
>> >  the>
>> > osds.
>> >
>> > The last time this happened, ceph -s reported one of the osds to be in
>> > state "active+clean+scrubbing". (I'm afraid I don't have the complete
>> > output from ceph -s anymore.)
>> >
>> > Does anybody have any idea what could be going wrong here?
>>
>> I think it's fixed in v0.39
>
> I'm already using 0.39, so, no. (Should have mentioned that to start with...)
>
>        Guido
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