Yes. The entire file is backed up again when gets modification.
Incremental backups include all modified files since last backup (Full,
Incremental ou differential). Incremental and differential are file based.
if you have a 100GB file and this was modified, it will be backed up and
will use this space again.
Kleber
2011/1/12 Lawrence Strydom <qhol...@gmail.com>
> Hi list.
>
> My understanding of an incremental backup is that only changed data is
> backed up. I use Bacula for backups to a disk array and configured it to do
> full backups once a month and daily incremental backups.
> I have been noticing that the incremental backups seem to be fairly large
> though - not as big as full backups but often a couple of gig. This leads me
> to believe that the entire file is being backed up instead of only the
> changed data which is my understanding of a differential backup.
>
> Disk space is a concern and I really don't want to back up the entire file
> if only a few characters have been changed. Is there any way to facillitate
> this?
>
> Thanks
>
> Laurie
>
>
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