2017-08-31 16:33 GMT+02:00 Ray Frush <fr...@rams.colostate.edu>:
> BackupPC, is relatively easy to setup for a schedule like you propose. We
> keep a 30 day backup history with a few extra weeks tacked on to get out to
> ~70 days, so the values below reflect our schedule:
>
> The values you'll want to check:
> $Conf{IncrKeepCnt} = 26; # This is the number of total 'unfilled'
> backups kept.
>
> $Conf{FillCycle} = 7; # This is how often a filled backup is kept (1 per
> week) which strongly influences the next setting
>
> $Conf{FullKeepCnt} = [ 4, 3, 0, ]; # This defines how many 'filled'
> backups are retained.
>
> The combination of filled and unfilled backups result in ~32 days of daily
> backups plus a couple of older ones just in case a user needs a file from
> more than a month ago.
Thanks for the reply.
In this case, you are making some full backups.
I don't want to run any full backup except for the first one, like
with rsnapshot.
With rsnapshot, only incrementals are made. I don't want to run full
backups because
I have some very very huge servers that will took 2 or 3 days to
transfer everything, but only
a couple of hours to transfer the changed files during an incremental run.
> To answer your second question: BackupPC does a good job of managing the
> 'filled' (think 'full') backups if you decide to delete one. I have found,
> that BackupPC is pretty good at self healing from issues. We had a number
> of backups impacted by running out of inodes during a cycle. While the
> files lost by the lack of Inodes cannot be recovered, BackupPC recovered
> gracefully on the next cycle after the file system was expanded.
So, what happens if I delete the filled backup ? I'll only loose that
single backup point or even some subsequent incrementals are lost
because some files was located to the "filled" backup ?
rsnapshot make uses of hardlinks, thus, the only way to loose a file
is to loose all hardlinks pointing to that file.
on the first run, all files are transfered. On following runs
(incrementals) only changed files are transfered, everything else is
hardlinked to the first backup. If you loose the "first" backup, the
hardlink is still resolved.
With BPC is the same ?
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