[Gluster-users] Fwd: FileSize changing in GlusterNodes

[Vijay Bellur]

On 08/26/2013 10:04 PM, Anand Avati wrote:
> On Sun, Aug 25, 2013 at 11:23 PM, Vijay Bellur <vbellur at redhat.com
> <mailto:vbellur at redhat.com>> wrote:
>
>     File size as reported on the mount point and the bricks can vary
>     because of this code snippet in iatt_from_stat():
>
>              {
>                      uint64_t maxblocks;
>
>                      maxblocks = (iatt->ia_size + 511) / 512;
>
>                      if (iatt->ia_blocks > maxblocks)
>                              iatt->ia_blocks = maxblocks;
>              }
>
>
>     This snippet was brought in to improve accounting behaviour for
>     quota that would fail with disk file systems that perform
>     speculative pre-allocation.
>
>     If this aides only specific use cases, I think we should make the
>     behaviour configurable.
>
>     Thoughts?
>
>     -Vijay
>
>
>
> This is very unlikely the problem. st_blocks field values do not
> influence md5sum behavior in any way. The file size (st_size) would, but
> both du -k and the above code snipped only deal with st_blocks.

I was referring to du -k as seen on the bricks and the mount point. I 
was certainly not referring to the md5sum difference.

-Vijay
>
> Bobby, it would help if you can identify the mismatching file and
> inspect and see what is the difference between the two files?
>
> Avati
>
>
>
>
>
>     -------- Original Message --------
>     Subject:        [Gluster-users] FileSize changing in GlusterNodes
>     Date:   Wed, 21 Aug 2013 05:35:40 +0000
>     From:   Bobby Jacob <bobby.jacob at alshaya.com
>     <mailto:bobby.jacob at alshaya.com>>
>     To: gluster-users at gluster.org <mailto:gluster-users at gluster.org>
>     <gluster-users at gluster.org <mailto:gluster-users at gluster.org>>
>
>
>
>     Hi,
>
>     When I upload files into the gluster volume, it replicates all the files
>     to both gluster nodes. But the file size slightly varies by (4-10KB),
>     which changes the md5sum of the file.
>
>     Command to check file size : du –k *. I’m using glusterFS 3.3.1 with
>     Centos 6.4
>
>     This is creating inconsistency between the files on both the bricks. ?
>     What is the reason for this changed file size and how can it be
>     avoided. ?
>
>     Thanks & Regards,
>
>     *Bobby Jacob*
>
>
>
>
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>