[Gluster-users] Inconsistent md5sum of replicated file

[Pranith Kumar K]

hi Anthony,
       Thanks for the outputs. Nothing suspicious. When did you notice 
that the md5sums are not matching? As soon as it is created or something 
happened before the file ended up in this situation.

Pranith.
On 09/08/2011 02:10 AM, Anthony Delviscio wrote:
> Pranith, thank you for clarifying.
>
> The folder was moved earlier today but the issue of md5sums of the 
> file being different still persists.
> The files are compressed and when decompressing the files, the file 
> with the correct (or expected md5sum) decompresses without error.  
> However, the file with the incorrect mdsum doesn't decompress properly 
> and cites crc and length errors.
>
> The pastie output of stat and fattr of the directory housing the file 
> can be found here:
> http://pastie.org/2499242
>
> Thank you
> Anthony
>
> On Wed, Sep 7, 2011 at 1:24 PM, Pranith Kumar K <pranithk at gluster.com 
> <mailto:pranithk at gluster.com>> wrote:
>
>     hi Anthony,
>         Parent directory is directory that contains the file.
>
>     Pranith
>
>
>     On 09/07/2011 08:18 PM, Anthony Delviscio wrote:
>>
>>     Pranith, by parent directory, do you mean the directory that
>>     contains the file or the top level directory of the brick?
>>
>>     My gluster volume info:
>>
>>     http://pastie.org/2493045
>>
>>     The hostnames used in the gluster volume info are DNS hostnames
>>     that resolve to 10GB interfaces on the Gluster nodes.
>>
>>     The hostname used in the mount options is a RR DNS hostname that
>>     resolves to all eight Gluster nodes.
>>
>>     Stat/md5sum/getfattr data of the identical files with different
>>     md5sums.
>>
>>     http://pastie.org/2497461
>>
>>     Thank you
>>
>>
>>
>>     On Wed, Sep 7, 2011 at 4:43 AM, Pranith Kumar K
>>     <pranithk at gluster.com <mailto:pranithk at gluster.com>> wrote:
>>
>>         hi Anthony,
>>               Could you send the output of the getfattr -d -m . -e
>>         hex <filepath> on both the bricks and also the stat output on
>>         the both the backends. Give the outputs for its parent
>>         directory also.
>>
>>         Pranith.
>>
>>
>>         On 09/07/2011 04:22 AM, Anthony Delviscio wrote:
>>>
>>>         I was wondering if anyone would be able to shed some light
>>>         on how a file could end up with inconsistent md5sums on
>>>         Gluster backend storage.
>>>
>>>         Our configuration is running on Gluster v3.1.5 in a
>>>         distribute-replicate setup consisting of 8 bricks.
>>>
>>>         Our OS is Red Hat 5.6 x86_64.Backend storage is an ext3 RAID 5.
>>>
>>>         The 8 bricks are in RR DNS and are mounted for
>>>         reading/writing via NFS automounts.
>>>
>>>         When comparing md5sums of the file from two different NFS
>>>         clients, they were different.
>>>
>>>         The extended attributes of the files on backend storage are
>>>         identical.The file size and permissions are identical.The
>>>         stat data (excluding inode on backend storage file system)
>>>         is identical.
>>>
>>>         However, running md5sum on the two files, results in two
>>>         different md5sums.
>>>
>>>         Copying both files to another location/server and running
>>>         the md5sum also results in no change – they’re still different.
>>>
>>>         Gluster logs do not show anything related to the filename in
>>>         question.Triggering a self-healing operation didn’t seem to
>>>         do anything and it may have to do with the fact that the
>>>         extended attributes are identical.
>>>
>>>         If more information is required, let me know and I will try
>>>         to accommodate.
>>>
>>>         Thank you
>>>
>>>
>>>         _______________________________________________
>>>         Gluster-users mailing list
>>>         Gluster-users at gluster.org  <mailto:Gluster-users at gluster.org>
>>>         http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
>>
>>
>
>

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