> On Fri, 9 May 2003 at 4:55pm, Per Nothagen wrote
>
> > I would like to know how to configure Amanda to do differential backup,
> > that is make full backups once every week or so and then let the daily
> > backup only backup changes since the last full backup. I have read the
man
> > pages carefully without success.
> >
> > I would like to run one configuration for the full backup and another
for
> > the differential so that I can decide when to do the full backup. I
don't
> > see a problem with that, I can figure that out my self.
>
> The question is, why?  Amanda can schedule this all quite well, and it's a
> lot less effort on your part to let it handle this.

If we are talking about typical filesystem which is changed a little, day
by day, we should based on Amanda. She is doing her job perfectly!
This is probably the best suggestion for Per.
But if you take into consideration the filesystem, which is growing day
by day overwriting the oldest data, it is completely unnecessary to have
level 0 backup at all. Differences can fit your tape/tapes but any level 0
backup
will not.

> > The problem I have is that I have not found how I shall tell Amanda that
it
> > shall do the level 1 dump required for the differential run. The only
way I
> > have found is to set bumpdays to a high value thus telling Amanda to
make
> > many dumps at the same level but I feel that I can not trust that stays
at
> > level 1. It would feel much safer if I could set "dumplevel 1" in the
> > configuration script. Is there a way to do something equivalent?
>
> Look at the 'nofull' and 'incronly' dump strategies in the example
> amanda.conf.

Unfortunately 'incronly' strategy will stop at level 9.

WJ