Hi Les,
That's what I thought, but this is really the ideal
(essential?) feature (almost) every backup software is
lacking!
As rsync sends only the modified bytes, there is a big
opportunity to store only these bytes and not the full
file!
This would be a huge advantage: imagine you use
whatever database for a specific software. You
wouldn't have to always play with the database in
order to find out what has changed and generate the
corresponding file, you could just make a dump of the
whole database and rsync would do the job for you!
These database tricks are nightmares as every software
manufacturer use their own...
I know a commercial solution based on this feature:
one of the claim is that the incremental backup
becomes so low in terms of volume of data that it
easily enables for remote archiving with a classical
high speed internet connection!
So may I ask again: is it (could it) be planned for a
future backuppc release?
--- Les Mikesell <[EMAIL PROTECTED]> a écrit :
> nestor picasse wrote:
> >
> > I'm quite new with Backuppc running on Debian, and
> I
> > am very impressed by the ease of use
> (configuration,
> > web interface, etc...)
> >
> > One question concerning incremental backup with
> rsync:
> > in case a file is found to have been modified and
> > retrieved with backuppc, is the entire modified
> file
> > stored in /pc/* or only the modified bytes?
> >
> > If not, is it planned for future release?
>
> If you use rsync, only the modified parts will be
> transferred over the
> network, but backuppc will reconstruct the entire
> new file, compress it,
> and link it as a new file into the pool along with
> any other identical
> copies. That's probably not ideal for growing
> log/mail files that are
> unique per machine and change every run, but if you
> copy the same
> changed file as an update to many machines it's not
> so bad.
>
> --
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