[Samba] samba4 PDC to BDC file replication

Ben Metcalfe bwmetcalfe at gmail.com
Fri Mar 1 17:06:56 MST 2013

Without inviting too many anti-CDDL flames; if you have ZFS on Linux
working on your samba 4 box, a zfs send and receive should do the job well;
preserving all file attributes and only transferring deltas.
Plus you get all the usual ZFS benefits (snapshots, copy-on-write,
check-summing), assuming you've got the RAM to make it work smoothly.


Has anyone tried this configuration?


On 1 March 2013 23:46, Gregory Sloop <gregs at sloop.net> wrote:

> Thanks. I asked this a few weeks back and didn't get much response.
> The half-hearted consensus was that rsync wouldn't do the job.
> [It seemed to me it should, as long as you're replicating between two
> DC members, and not to a non DC member. (Because, as I figured it, a
> non DC member wouldn't have any idea about the users/groups, since
> it's not replicating and of the DC data, right?)]
> Glad for any light you can shed - and thanks for letting me know it
> should work. I'll tinker with it when I'm to that point.
> -Greg
> JA> On Thu, Feb 28, 2013 at 09:13:39PM -0800, Gregory Sloop wrote:
> >>
> >> I'm in the same boat, and I'm only aware of two possibilities.
> >>
> >> 1) Robocopy - using a Windows client.
> >>    BUT Robocopy doesn't do file deltas - changed files are copied in
> >>    their entirety. Which isn't a problem if you don't have large
> >>    files. But if you've got a 10G file that changes often, then this
> >>    probably isn't the best alternative.
> >>
> >> 2) http://www.bvckup.com/support/ [Bvckup]
> >>    This also appears to be a Windows utility, but does handle file
> >>    delta's. I have never used this tool and so can't vouch for it in any
> >>    way.
> >>
> >> If you find a functional solution, that preferably can be used on the
> >> two Linux/Samba boxes to do file-deltas and still maintain the
> >> permissions - that would be best.
> >>
> >> One other option that might work:
> >> Rsync the data, and use robocopy to simply duplicate the permissions
> >> structure. [I believe this is possible.]
> JA> rsync using -A (preserve ACLs) and -X (preserve extended attributes)
> JA> and -o (preserve owner (super-user only)) and -g (preserve group)
> JA> should copy thing perfectly.
> --
> Gregory Sloop, Principal: Sloop Network & Computer Consulting
> Voice: 503.251.0452 x82
> EMail: gregs at sloop.net
> http://www.sloop.net
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