On Sat, Oct 16, 2010 at 09:33:13AM +0200, Hugo Letemplier wrote:
> Hi thanks a lot for your answers
>
> I have retried with a new test scenario its clear now and deleting an
> incremental is really dangerous.
> But I think that a function that enable the administrator to "join" 2 jobs
> would be cool.
> Imagine that one day lots of data manipulation are done on the machine that I
> want to backup, so there is a great difference between 2 incremental. The
> jobs are done, and deleting one job is dangerous for the jobs that follows
> In this case, that would be great to mix 2 jobs.
> Its quite complicated to explain I know.
> Take a look at this little scenario, a classical Full with his incremental
> jobs : the client is typically a big file server
>
> 1 - The full
> 2 - an incremental
> 3 - someone make a mistake while he was exploring the file server he made
> lots of copy of files in the server (for example : a bad drag and drop).
> 4 - a nightly scheduled incremental
> 5 - the administrator see that the last incremental got a lot of new files
> and that job bytes got a huge value.
> 5 - the user see his error and deletes the duplicates
> 6 - a new incremental is ran
> 7 - after checking everything, I want to reduce the size of my backups by
> "fusioning" the two last incrementals. The idea is to add new files of step 4
> to step 6 but without the files deleted at step 6
>
> In a mathematical view, it can be seen like that : Inc6.1 = Inc4 - (Files of
> Inc4 deleted at Inc6.0) + (new files of inc6.0) + (crush files modified
> after Inc4 with their version of inc6.0)
>
> I hope that it can be understood more easily than the previous post !
Perhaps a VirtualFull backup is what you are looking for?
> Thanks a lot
>
> Hugo
>
> Le 13 oct. 2010 à 17:53, Jari Fredriksson a écrit :
>
> > On 13.10.2010 18:21, Hugo Letemplier wrote:
> >> Hi,
> >> I have an important question that will help me validating some specs
> >> about bacula 5.0.2
> >> Imagine the following scenario:
> >> 1 - a full
> >> 2 - an incremental
> >> 3 - an incremental
> >> 4 - another incremental
> >>
> >> if I delete the incremental of step 3, does it move the files that
> >> have been added during step "3" onto the incremental of step "4"
> >>
> >> I have tried this scenario but my result is not clear. Can you tell me
> >> your experience ?
> >>
> >> In other words: can I delete one Incremental without deleting more
> >> recents incrementals or if I delete the full does it upgrade the first
> >> incremental into full ?
> >>
> >
> > I *think* Bacula uses timestamps when doing incrementals. if you delete
> > one incremental, you lose the files modified/created for that day.
> >
> > But if you delete the full, Bacula "upgrades" the next incremental to
> > Full, as it finds no suitable Full to do the incremental for.
> >
> >
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