On Thu, Feb 24, 2005 at 04:44:29PM -0800, Brooks, Jason wrote:
> Hello,
> 
> A question about amanda's indexing and database
> 
> Short version: 
> 
> Does a mechanism to share databases exist in amanda?  
> 
> Long version: (best with an example)
> 
> I want >4 different configurations.  All but one will be in offsite
> storage.  I want different configurations because then I will be assured
> that each tapeset I have in the changer will be a complete set that I
> change out each week for a new set.


Before even attempting an answer I have a question.

What, for your needs, are the properties of a "complete tapeset"?
It sounds like you are thinking of traditional backup systems
where you do a monster dump of everything on day zero and then
tiny incrementals til the next monster dump.  In such a scheme
you need the monster dump or none of the little dumps are valid.
So they form nice discreet sets.

Amanda spreads the level 0 dumps across then entire dumpcycle.
So there is no discreet starting point to a set of tapes.
If your dumpcycle is 7 days and you do a run every days (runspercycle)
then the Monday - Sunday tapes are as valid a set as the Wednesday -
Tuesday.  Any 7 sequential tapes is a set.

> 
> example:
> five configurations: Daily1-5
> dumpcycle = five weeks
> runspercycle = 7 days worth

dumpcycle is the 'maximum' time you want amanda to allow between
level 0 dumps.  Do you really only want a full dump every 35 days?
I suspect what you want is a dumpcycle of 7 days and runspercycle 7
(note, no units).

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
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