Re: Random checksum errors (bluestore on Luminous)

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BTW: Ceph version is 12.2.2 (the cluster was setup with 12.2.1, then
updated to 12.2.2.2 on Debian 9).

services:
    mon: 3 daemons, quorum ceph1,ceph2,ceph3
    mgr: ceph1(active), standbys: ceph2
    mds: cephfs-1/1/1 up  {0=ceph1=up:active}, 2 up:standby
    osd: 10 osds: 10 up, 10 in

data:
    pools:   5 pools, 256 pgs
    objects: 8097k objects, 10671 GB
    usage:   25403 GB used, 11856 GB / 37259 GB avail
    pgs:     254 active+clean
             1   active+clean+scrubbing+deep+inconsistent+repair
             1   active+clean+inconsistent

Regards
Martin


Am 17.12.2017 um 10:40 schrieb Martin Preuss:
> Hi,
> 
> is there a way to find out which files on CephFS is are using a given
> pg? I'd like to check whether those files are corrupted...
> 
> Also, how do I translate a bluestore like this
> 
> --------------------------------------------------------------------X8
> 2017-12-17 03:04:29.512839 7f86c6347700 -1
> bluestore(/var/lib/ceph/osd/ceph-0) _verify_csum bad crc32c/0x1000
> checksum at blob offset 0x0, got 0x6706be76, expected 0xb8c0b7a7, device
> location [0x29b5c900000~1000], logical extent 0x180000~1000, object
> #5:fc07447a:::100002cbc80.00000132:head#
> --------------------------------------------------------------------X8
> 
> to a real position on disc or even a file (you may have noted that again
> the checksum returned is 0x6706be76 as still is in any of my cases,
> using compression or not).
> 
> This problem is really unnerving...
> 
> 
> Regards
> Martin
> 
> 
> Am 10.12.2017 um 23:24 schrieb Peter Woodman:
>> IIRC there was a bug related to bluestore compression fixed between
>> 12.2.1 and 12.2.2
>>
>> On Sun, Dec 10, 2017 at 5:04 PM, Martin Preuss <martin@xxxxxxxxxxxxx> wrote:
>>> Hi,
>>>
>>>
>>> Am 10.12.2017 um 22:06 schrieb Peter Woodman:
>>>> Are you using bluestore compression?
>>> [...]
>>>
>>> As a matter of fact, I do. At least for one of the 5 pools, exclusively
>>> used with CephFS (I'm using CephFS as a way to achieve high availability
>>> while replacing an NFS server).
>>>
>>> However, I see these checksum errors also with uncompressed pools...
>>>
>>>
>>>
>>> Regards
>>> Martin
>>>
>>>
>>>
>>> --
>>> "Things are only impossible until they're not"
>>>
> 
> 


-- 
"Things are only impossible until they're not"
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