On Monday 17 April 2006 16:47, Ross Vandegrift wrote:
> On Mon, Apr 17, 2006 at 12:15:07PM +0100, Anne Wilson wrote:
> > The DLEs are set to a 4-day rotation, but in practice I
> > am seeing level 0 backups almost every other day, for all of them.
> >
> > It would seem reasonable, to me, based on the small amount of changes,
> > to have a level0 weekly, for all of them, I think.
>
> Hi Anne,
>
> If you want a level0 weekly why not set your dumpcycle to 7 days?  This
> basically tells Amanda to try and do weekly level0 backups and
> incrementals are okay in between.
>
> Another thing you can do that helped me out a lot - change the bump
> parameters!  I work with a fairly large Amanda setup where disk space
> is usually at a premium.  I was able to save a lot of space by tuning
> the bump parameters to do more higher-level incremental backups.
>
> While the system previously wasted a lot of diskspace in the second
> half of the cycle doing level 1 and 2 backups, now it usually bumps
> every day, hitting level 5 or 6 by the end of the week.
>
> Of course you take a hit on restore time, but restores are pretty
> decent from virtual tape as it is, so I'm not too concerned about
> there being five or six steps instead of two or three.

Here's an example of what I meant about bumping things.

home had a level0 on the 7th, 9th, and 10th of April, then

Friday, 14th
borg    /Public                           1      0      0  71.1   0:0   165.8   
0:0  3740.5
borg    /home                             0  23329  21026  90.1  83:1  4308.8  
82:2  4352.8
borg    /home/anne/Photos                 1      3      4   --    0:0 15043.1   
0:0 40255.2

with no mention of bumping or promoting.  Then

Saturday 15th
  planner: Full dump of borg:/home/anne/Photos promoted from 2 days ahead.
  planner: Full dump of borg:/Public promoted from 2 days ahead.
  taper: tape Dailys-17 kb 1968832 fm 3 [OK]

Sunday 16th
  planner: Incremental of borg:/home bumped to level 2.
  planner: Full dump of borg:/home/anne/Photos promoted from 3 days ahead.
  planner: Full dump of borg:/Public promoted from 3 days ahead.

Monday 17th
  planner: Full dump of borg:/home/anne/Photos promoted from 3 days ahead.
  planner: Full dump of borg:/Public promoted from 3 days ahead.

I doubt if there has been any change at all in either Photos or Public during 
that three days.  I wish I could see what's going on :-(

Anne

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