On 03/01/11 15:18, Jean-Peer Lorenz wrote:
>> This option is included in version 0.10.5
> I don't think that the general option to purge (as currently included in 
> sbackup) meets the described feature request. Therefore, I reopen this bug. 
> Remarks and patches are welcome.

Ideally, to free up necessary diskspace in combination with logarithmic 
purge, it would be good if the purge could be incrementally 'thinned'.
The default is:
* keep all from yesterday
* keep one per day from last week
* keep one per week from last month
* keep one per month from last year
* keep one per quarter from 2nd last year
* keep one per year further into past

(Especially the last one, while growing slowly, will keep growing
forever!)

But, when tight on diskspace, one could 'thin' this to something like:
* keep last one from yesterday
* keep one per two days from last week
* keep one per two weeks from last two months
* keep one per two months from last year
* keep one per half year from 2nd last year
* keep one per 2^n years for the nth year into past (true logarithmic!)

Alternate to steering on free space, one might want to set a limit on 
total diskspace allocated to backups. This might even work when disk 
free cannot be determined (as with ftp).


Anton.

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https://bugs.launchpad.net/bugs/294019

Title:
  Purge to specified free disk space or backup size

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