Re: cephfs metadata pool: deep-scrub error "omap_digest != best guess omap_digest"

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On Thu, Sep 1, 2016 at 1:08 AM, Sean Redmond <sean.redmond1@xxxxxxxxx> wrote:
> I have updated the tracker with some log extracts as I seem to be hitting
> this or a very similar issue.

I've updated the tracker asking for "rados list-inconsistent-obj" from
the relevant pgs.

That should give us a better idea of the nature of the divergent data.

>
> I was unsure of the correct syntax for the command ceph-objectstore-tool to
> try and extract that information.
>
> On Wed, Aug 31, 2016 at 5:56 AM, Brad Hubbard <bhubbard@xxxxxxxxxx> wrote:
>>
>>
>> On Wed, Aug 31, 2016 at 2:30 PM, Goncalo Borges
>> <goncalo.borges@xxxxxxxxxxxxx> wrote:
>> > Here it goes:
>> >
>> > # xfs_info /var/lib/ceph/osd/ceph-78
>> > meta-data=/dev/sdu1              isize=2048   agcount=4,
>> > agsize=183107519 blks
>> >          =                       sectsz=512   attr=2, projid32bit=1
>> >          =                       crc=0        finobt=0
>> > data     =                       bsize=4096   blocks=732430075,
>> > imaxpct=5
>> >          =                       sunit=0      swidth=0 blks
>> > naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
>> > log      =internal               bsize=4096   blocks=357631, version=2
>> >          =                       sectsz=512   sunit=0 blks, lazy-count=1
>> > realtime =none                   extsz=4096   blocks=0, rtextents=0
>> >
>> >
>> > # xfs_info /var/lib/ceph/osd/ceph-49
>> > meta-data=/dev/sde1              isize=2048   agcount=4,
>> > agsize=183105343 blks
>> >          =                       sectsz=512   attr=2, projid32bit=1
>> >          =                       crc=0        finobt=0
>> > data     =                       bsize=4096   blocks=732421371,
>> > imaxpct=5
>> >          =                       sunit=0      swidth=0 blks
>> > naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
>> > log      =internal               bsize=4096   blocks=357627, version=2
>> >          =                       sectsz=512   sunit=0 blks, lazy-count=1
>> > realtime =none                   extsz=4096   blocks=0, rtextents=0
>> >
>> >
>> > # xfs_info /var/lib/ceph/osd/ceph-59
>> > meta-data=/dev/sdg1              isize=2048   agcount=4,
>> > agsize=183105343 blks
>> >          =                       sectsz=512   attr=2, projid32bit=1
>> >          =                       crc=0        finobt=0
>> > data     =                       bsize=4096   blocks=732421371,
>> > imaxpct=5
>> >          =                       sunit=0      swidth=0 blks
>> > naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
>> > log      =internal               bsize=4096   blocks=357627, version=2
>> >          =                       sectsz=512   sunit=0 blks, lazy-count=1
>> > realtime =none                   extsz=4096   blocks=0, rtextents=0
>>
>> OK, all look pretty similar so there goes that theory ;)
>>
>> I thought if one or more of the filesystems had a smaller isize they would
>> not
>> be able to store as many extended attributes and these would spill over
>> into
>> omap storage only on those OSDs. It's not that easy but it might be
>> something
>> similar given the ERANGE errors.
>>
>> I've assigned the tracker (thanks) to myself and will follow through on
>> it.
>> Please give me a little time to look further into the ERANGE errors and
>> the logs
>> you provided (thanks again) and I'll update here and the tracker when I
>> know
>> more.
>>
>> --
>> Cheers,
>> Brad
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@xxxxxxxxxxxxxx
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>
>



-- 
Cheers,
Brad
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