Re: [Bacula-users] Windows Server 2012 with built-in deduplication

On Mon, Aug 5, 2013 at 9:20 AM, Bojan Zdrnja (SANS ISC)
<bojan.isc AT gmail DOT com> wrote:
> Hi,
>
> I just installed Bacula server on a Linux box and I'm testing various
> clients.
>
> I have a Windows Server 2012 machine which has deduplication enabled
> (https://blogs.technet.com/b/filecab/archive/2012/05/21/introduction-to-data-deduplication-in-windows-server-2012.aspx?Redirected=true).
> This is a new feature in Windows Server 2012 which does chunk based
> deduplication.
> It saves quite a bit of disk space.
>
> I installed the latest free Bacula client for Windows (5.2.10, 64-bit).
>
> The problem is that the backups are incomplete. The client goes over all
> files, but most of files are 0 bytes on the server. When trying to restore
> them, I get a 0 byte file as well.
> This can be seen from the backup's report as well - it says 1 GB total while
> the total amount of files is about 50 GB.
>
> Does anyone know if the latest version of the client (6.0.6) works OK with
> Windows Server 2012 that has deduplication turned on? I don't mind buying
> it, of course, but would like to know that it works ok :)
> Or if there is a setting that might help with the free version. When I
> disable VSS I get the same results as when it is enabled.
>
> Thanks,
>
> Bojan
>

I usually see no less than 4k as the "size on disk" for deduped files,
I would suggest testing that you can open the 0k files from the server
before they are backed up, this might have nothing to do with Bacula.

Cheers

Arne

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