I see that problem, when the osds fail the mds fail, with errors with
type "slow metadata, slow requests" but do not recover once the cluster
has recovered ... Why?
El 5/5/21 a las 11:07, Andres Rojas Guerrero escribió:
> Sorry, I have not understood the problem well, the problem I see is that
> once the OSD fails, the cluster recovers but the MDS remains faulty:
>
> # ceph status
> cluster:
> id: c74da5b8-3d1b-483e-8b3a-739134db6cf8
> health: HEALTH_WARN
> 3 clients failing to respond to capability release
> 2 MDSs report slow metadata IOs
> 2 MDSs report slow requests
> 2 MDSs behind on trimming
> Reduced data availability: 256 pgs inactive, 18 pgs down,
> 238 pgs incomplete
> 22 slow ops, oldest one blocked for 26719 sec, daemons
> [osd.134,osd.210,osd.244,osd.251,osd.301,osd.514,osd.520,osd.528,osd.642,osd.713]...
> have slow ops.
>
> services:
> mon: 3 daemons, quorum ceph2mon01,ceph2mon02,ceph2mon03 (age 23h)
> mgr: ceph2mon02(active, since 6d), standbys: ceph2mon01, ceph2mon03
> mds: nxtclfs:2 {0=ceph2mon01=up:active,1=ceph2mon02=up:active} 1
> up:standby
> osd: 768 osds: 736 up (since 7h), 736 in (since 7h)
>
> data:
> pools: 2 pools, 16384 pgs
> objects: 33.39M objects, 39 TiB
> usage: 64 TiB used, 2.6 PiB / 2.6 PiB avail
> pgs: 1.562% pgs not active
> 16128 active+clean
> 238 incomplete
> 18 down
>
> El 5/5/21 a las 11:00, Andres Rojas Guerrero escribió:
>> Yes, the principal problem is the MDS start to report slowly and the
>> information is no longer accessible, and the cluster never recover.
>>
>>
>> # ceph status
>> cluster:
>> id: c74da5b8-3d1b-483e-8b3a-739134db6cf8
>> health: HEALTH_WARN
>> 2 clients failing to respond to capability release
>> 2 MDSs report slow metadata IOs
>> 1 MDSs report slow requests
>> 2 MDSs behind on trimming
>> Reduced data availability: 238 pgs inactive, 8 pgs down, 230
>> pgs incomplete
>> Degraded data redundancy: 1400453/220552172 objects degraded
>> (0.635%), 461 pgs degraded, 464 pgs undersized
>> 241 slow ops, oldest one blocked for 638 sec, daemons
>> [osd.101,osd.127,osd.155,osd.166,osd.172,osd.189,osd.200,osd.210,osd.214,osd.233]...
>> have slow ops.
>>
>> services:
>> mon: 3 daemons, quorum ceph2mon01,ceph2mon02,ceph2mon03 (age 25h)
>> mgr: ceph2mon02(active, since 6d), standbys: ceph2mon01, ceph2mon03
>> mds: nxtclfs:2 {0=ceph2mon01=up:active,1=ceph2mon02=up:active} 1
>> up:standby
>> osd: 768 osds: 736 up (since 11m), 736 in (since 95s); 416 remapped pgs
>>
>> data:
>> pools: 2 pools, 16384 pgs
>> objects: 33.40M objects, 39 TiB
>> usage: 63 TiB used, 2.6 PiB / 2.6 PiB avail
>> pgs: 1.489% pgs not active
>> 1400453/220552172 objects degraded (0.635%)
>> 15676 active+clean
>> 285 active+undersized+degraded+remapped+backfill_wait
>> 230 incomplete
>> 176 active+undersized+degraded+remapped+backfilling
>> 8 down
>> 6 peering
>> 3 active+undersized+remapped
>>
>> El 5/5/21 a las 10:54, David Caro escribió:
>>>
>>> Can you share more information?
>>>
>>> The output of 'ceph status' when the osd is down would help, also 'ceph
>>> health detail' could be useful.
>>>
>>> On 05/05 10:48, Andres Rojas Guerrero wrote:
>>>> Hi, I have a Nautilus cluster version 14.2.6 , and I have noted that
>>>> when some OSD go down the cluster doesn't start recover. I have checked
>>>> that the option noout is unset.
>>>>
>>>> What could be the reason for this behavior?
>>>>
>>>>
>>>>
>>>> --
>>>> *******************************************************
>>>> Andrés Rojas Guerrero
>>>> Unidad Sistemas Linux
>>>> Area Arquitectura Tecnológica
>>>> Secretaría General Adjunta de Informática
>>>> Consejo Superior de Investigaciones Científicas (CSIC)
>>>> Pinar 19
>>>> 28006 - Madrid
>>>> Tel: +34 915680059 -- Ext. 990059
>>>> email: [email protected]
>>>> ID comunicate.csic.es: @50852720l:matrix.csic.es
>>>> *******************************************************
>>>> _______________________________________________
>>>> ceph-users mailing list -- [email protected]
>>>> To unsubscribe send an email to [email protected]
>>>
>>
>
--
*******************************************************
Andrés Rojas Guerrero
Unidad Sistemas Linux
Area Arquitectura Tecnológica
Secretaría General Adjunta de Informática
Consejo Superior de Investigaciones Científicas (CSIC)
Pinar 19
28006 - Madrid
Tel: +34 915680059 -- Ext. 990059
email: [email protected]
ID comunicate.csic.es: @50852720l:matrix.csic.es
*******************************************************
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