Hi,

On Tue, 08 Sep 2009, Kern Sibbald wrote:

> I think I now understand what you are asking for.  You want to have 
> Incremental Jobs go forward in time from a Full (current behavior) and 
> incremental (decremental) jobs that go backward in time.   Those reverse 
> incremental jobs would be something synthesized from the Full in question and 
> a previous Full.   The reason is that this would allow one Full to cover 
> twice the period of time that it does currently (give the appropriate 
> incrementals are available).
> 
> Is that correct?

Pretty much.  Though I would note that the last sentence possibly needs
clarification.  As with regular incrementals, you can build up several over
time allowing the oldest full backup to cover many previous periods of time
(in combination with the appropriate sequential series of "decremantals").

Hopefully that clarification doesn't change anything much.

> If my understanding of what you are proposing is correct, then yes, I think 
> it 
> is possible.  The next questions are: is it something we want to implemement? 
> how big of a project is it? who would implement it?  when?
> 
> I don't have any answer for the above, except I imagine that it is not at all 
> a small project.

Of course.  I guess I might write up a proposal and if it's deemed too much
work, too little benefit or some combination of those, it will presumably
be either long-fingered or refused for those reasons.

Thanks for your patience :-)

Gavin


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