On 9/28/05, Jon LaBadie <jon AT jgcomp DOT com> wrote:
> On Wed, Sep 28, 2005 at 01:40:37PM -0400, u wrote:
> > >
> > > Amanda will not do incrementals of any DLE until it has done a full
> > > dump (level 0).  You would have to have at least a starting point done
> > > by amanda.  Then perhaps you could change the settings to do infinite
> > > (actually just very very long) dumpcycle and set amanda to an increment
> > > only strategy.
> > OK, assume this is done.  We do one initial dump (level 0) and then
> > every four weeks we repeat the process and do another full dump (level
> > 0).  Inside each four weeks cycle, we follow an incremental only
> > strategy.
> > >
> >
> > > You could
> > > only get from amanda those files that changed during the week.  It would
> > > not have a copy of the original starting files.  Amanda's dumps would only
> > > be good for something that changed and subsequently was lost or trashed.
> > > You could get back the changed version.  But if the file was simply 
> > > trashed
> > > amanda would not have the original to restore.  (no level 0 in your 
> > > scheme)
> > >
> > I have a doubt.  When Amanda take a backup of a changed file, does it
> > backup the entire file or just the diff?
> > If we follow the assumptions stated above, wouldn't we have a copy of
> > the file from the last level 0 full backup plus all of the changes
> > during the 4 weeks cycle?
> >
>
> You cut-off, and perhaps missed, the opening of my paragraph:
>
>   "Assuming amanda would do what you seek,"
>
> I.e. if amanda would do only incrementals for you.
> In that case you have no level 0.
>
> As to your scheme, sure that should work.  All you are doing is
> using amanda with a dumpcycle of 4 weeks.
>
> Another variation is a very long dumpcycle, basically infinite,
> and after the initial level 0, you use amadmin to "force" a
> level 0 whenever you wish.  Keep the standard config as "incremental
> only" and you control when the level 0's are done.
>
> --
> Jon H. LaBadie                  jon AT jgcomp DOT com
>  JG Computing
>  4455 Province Line Road        (609) 252-0159
>  Princeton, NJ  08540-4322      (609) 683-7220 (fax)
>
This works for me, thank you.