On Monday 17 April 2006 19:24, Jon LaBadie wrote:
>
> Just to be sure you understand what is happening, I'll try an
> example based on your DLEs.  Assumptions, 3 DLEs, photo (4GB),
> public (3GB), and home (21GB); dumpcycle == runspercycle == 4.
>
> Amanda knows from historical data that it must backup 28GB with
> level 0's (4+3+21) every 4 days.  It would like to balance the
> daily runs with 7GB of level 0 each day plus incrementals.  But
> on some days there are no level 0's scheduled as you have so
> few DLE and such uneven sizes.  Both contribute to lots of
> promotions.  Amanda takes the opportunity this run to get up
> to that 7GB balance by doing early level 0's of photo and public.
>
> Of course the next day there are no level 0's scheduled.  But
> again amanda tries to balance.
>
> If instead the home DLE were 3 or 4 chunks, amanda would find
> a more balanced situation and there would be few(er) promotions.
>
That makes it a lot clearer, thanks.

> One of the goals of the amanda planner is to have a consistant
> sized backup each run.  That is clearly not going to happen
> with the DLEs you are backing up.  If you want to defeat this
> aspect of amanda's planning the parameters are there, probably
> maxpromotedays 0 is what you want.

I think you're right.

When I add the video directories,  I'll put them into two DLEs, which will 
give around 5GB in one and 10GB in the other, and I'll start them on 
different days.  That should help the balancing, I think.

Anne

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