Re: still recovery issues with cuttlefish

[Stefan Priebe <s.priebe@profihost.ag>]

Mike we already have the async patch running. Yes it helps but only 
helps it does not solve. It just hides the issue ...
Am 01.08.2013 20:54, schrieb Mike Dawson:
> I am also seeing recovery issues with 0.61.7. Here's the process:
>
> - ceph osd set noout
>
> - Reboot one of the nodes hosting OSDs
>      - VMs mounted from RBD volumes work properly
>
> - I see the OSD's boot messages as they re-join the cluster
>
> - Start seeing active+recovery_wait, peering, and active+recovering
>      - VMs mounted from RBD volumes become unresponsive.
>
> - Recovery completes
>      - VMs mounted from RBD volumes regain responsiveness
>
> - ceph osd unset noout
>
> Would joshd's async patch for qemu help here, or is there something else
> going on?
>
> Output of ceph -w at: http://pastebin.com/raw.php?i=JLcZYFzY
>
> Thanks,
>
> Mike Dawson
> Co-Founder & Director of Cloud Architecture
> Cloudapt LLC
> 6330 East 75th Street, Suite 170
> Indianapolis, IN 46250
>
> On 8/1/2013 2:34 PM, Samuel Just wrote:
>> Can you reproduce and attach the ceph.log from before you stop the osd
>> until after you have started the osd and it has recovered?
>> -Sam
>>
>> On Thu, Aug 1, 2013 at 1:22 AM, Stefan Priebe - Profihost AG
>> <s.priebe@profihost.ag> wrote:
>>> Hi,
>>>
>>> i still have recovery issues with cuttlefish. After the OSD comes back
>>> it seem to hang for around 2-4 minutes and then recovery seems to start
>>> (pgs in recovery_wait start to decrement). This is with ceph 0.61.7. I
>>> get a lot of slow request messages an hanging VMs.
>>>
>>> What i noticed today is that if i leave the OSD off as long as ceph
>>> starts to backfill - the recovery and "re" backfilling wents absolutely
>>> smooth without any issues and no slow request messages at all.
>>>
>>> Does anybody have an idea why?
>>>
>>> Greets,
>>> Stefan
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