[Gluster-users] Fwd: FileSize changing in GlusterNodes

[Anand Avati]

On Sun, Aug 25, 2013 at 11:23 PM, Vijay Bellur <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.

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>
> To:     gluster-users at gluster.org <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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