On Tue, Feb 13, 2018 at 3:14 AM Josef Zelenka <josef.zelenka@xxxxxxxxxxxxxxxx> wrote:
Oh, sorry, forgot to mention - this cluster is running jewel :(
On 13/02/18 12:10, John Spray wrote:
> On Tue, Feb 13, 2018 at 10:38 AM, Josef Zelenka
> <josef.zelenka@xxxxxxxxxxxxxxxx> wrote:
>> Hi everyone, one of the clusters we are running for a client recently had a
>> power outage, it's currently in a working state, however 3 pgs were left
>> inconsistent atm, with this type of error in the log(when i attempt to ceph
>> pg repair it)
>>
>> 2018-02-13 09:47:17.534912 7f3735626700 -1 log_channel(cluster) log [ERR] :
>> repair 15.1e32 15:4c7eed31:::10002110e12.0000004b:head on disk size (0) does
>> not match object info size (4194304) adjusted for ondisk to (4194304)
>>
>> i know this can be fixed by truncating the ondisk object to the expected
>> size, but it clearly means we've lost some data. This cluster is used for
>> cephfs only, so i'd like to find which files on the cephfs were affected. I
>> know the OSDs for that pg, i know which pg and which object was affected, so
>> i hope it's possible. I found a 2015 entry in the mailing list, that does
>> the reverse thing
>> (http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-October/005384.html),
>> as in - map file to pg/object. I have 230TB of data in that cluster in a lot
>> of files, so mapping them all would take a long time. I hope there is a way
>> to do this, if people here have any idea/experience with this, it'd be
>> great.
> We added a tool in luminous that does this:
> http://docs.ceph.com/docs/master/cephfs/disaster-recovery/#finding-files-affected-by-lost-data-pgs
>
> John
>
>
>
>> Thanks
>>
>> Josef Zelenka
>>
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>> ceph-users@xxxxxxxxxxxxxx
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