Re: [Bacula-devel] Feature request : Implement synthetic full backup.

[Marc C. <mc...@si...>]

A synthetic full backup is a full backup made without connecting to the=20
server.
It is created using the allready made backups.

=46or instance, say that last sunday we made a full backup.
Then all week long, we created incremental backups, in order to do them fas=
t.
Now comes sunday again, and we need another full.
The synthetic backup makes it possible to do instead an incremental backup=
=20
(during the night for instance), and then create a synthetic backup during=
=20
the day, by using the full and incrementals from the week. The synthetic=20
backup will be exactly like a full made sunday night on the tape, but the=20
production interruption on the server will be minimal, as the production=20
server will only have to send incrementals.
The benefit is that=20
=2D the production server just does an incremental
=2D the synthetic backup on tape is just as a single full backup, and can b=
e=20
restored very fast.

Le Mercredi 16 Novembre 2005 12:12, Kern Sibbald a =E9crit=A0:
> Hello,
>
> I'm sorry, but I don't understand what a synthetic full backup is or what
> it is intended to accomplish.  Could you be a bit more specific on what t=
he
> objective is in general, and how it works in particular?
>
> On Wednesday 16 November 2005 10:44, BOLLENGIER Eric wrote:
> > Hi,
> >
> > Item n: Implement synthetic full backup.
> >   Origin:  Marc Cousin and Eric Bollengier
> >   Date:   15 November 2005
> >   Status:
> >
> >   What:   A synthetic full backup is a network-less full backup that us=
es
> > a compilation of the last incremental backups. With this feature, you c=
an
> > tell to bacula "make me a full backup in the state of last sunday". Oth=
er
> > backup software like Time Navigator, Retrospect or Networker are using
> > this technology.
> >
> >   Why:    This functionality can be very useful, it speeds up backup and
> >           restore operations.
> >
> > Comments, questions ?
> >
> > Regards
> >
> >
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