Re: Random checksum errors (bluestore on Luminous)

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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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