On Thursday 16 August 2012 16:35:49 Tyler J. Wagner wrote:
> On 2012-08-16 15:51, Les Mikesell wrote:
> >> I've now disabled incremental backups on this server, but maybe someone
> >> has an idea how to enable incremental backups for this host as well.
> >
> > I think you've jumped to conclusions here - you need to time full runs
> > other than the first. Other things to keep in mind are:
> > Incremental runs copy everything that has changed since the previous full.
>
> One way we've improved this is to make incrementals reference the previous
> incremental. As long as your filesystem timestamps are accurate (system
> dates are synced, file modification times are updated on write), this works
> well.
> $Conf{IncrLevels} = [ '1', '2', '3', '4', '5', '6', '7' ];
> We use seven on the off chance that someone runs a manual one that week.This variable (and also the corresponding FillLevels) works differently than you expect: It means keep one backup at IncrInterval, keep 2 backups at 2*IncrInterval before that, keep 3 backups at 4*IncrInterval before that, keep 5 backups at 8*IncrInterval before that,.... You actually "want" to set this to just plain 7 to make backuppc keep seven incremental backups at IncrInterval. For FullLevels you are well advised setting it to [4, 0, 4] or [4, 0, 6]. Given a FullInterval of 7 days this results in keeping the last four full backups (which happen to be weekly), keep zero with two weeks interval and keep 4 (or 6) at four-weeks interval which is appr. a month. Have fun, Arnold
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