Re: [BackupPC-users] Keeping 1 "golden" backup for a year

On 3/25/2011 10:36 AM, Brad Alexander wrote:
> Okay, this kind of confuses me. I would like to have the following
> backup strategy:
>
> 6 incrementals (*2)
> 1 weekly (*2)
> 1 yearly (*1)
>
> Currently,
>
> $Conf{FullKeepCnt} = [ 1, 0, 1, 0, 0, 1 ];
>

> So how should I set up my FullKeepCnt to keep one backup for a year and
> two sets of fulls/incrementals for the past two weeks?

The meaning of FullKeepCnt array doubles for each element so if you do 
weekly fulls you can't quite hit yearly boundaries.
[2,0,0,0,0,100]
would keep the 2 most recent weeklys and one every 32 weeks for longer 
than you are likely to want them.  Per 
http://sourceforge.net/apps/mediawiki/backuppc/index.php?title=Keep_yearly_backups
the next step would be 64 weeks - but you could keep monthlys to have 
the last year boundary like:
[2,0,13,0,0,100]
Note that with backuppc's pooling it doesn't take that much more space 
to keep more history unless there is a big turnover in file content. 
Also, you may see a few more nearby fulls than you expect since they are 
retained if any incrementals depend on them.

-- 
   Les Mikesell
    lesmikesell AT gmail DOT com



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