Hi,
Adam Goryachev wrote on 2016-06-21 20:17:43 +1000 [Re: [BackupPC-users] Full
period]:
> On 21/06/2016 17:28, absolutely_free AT libero DOT it wrote:
> > [...]
> > I noticed that I am unable to complete backups for each server in one
> > day; probably it takes 3 days to finish.
> > [...]
> >
> > Is there a way to configure BackupPC to run Full backup every X
> > backups (and NOT every X days)?
have you understood the concept of full and incremental backups? Is your
requirement really "I need every Xth backup to be exact, no matter how far
in time they are appart, and need to trade exactness for speed in between"?
> > I think that probably I'll save some bandwidth, am I wrong?
Yes, quite the opposite, if you are using rsync(d) (and if not, you probably
should be).
> Why does the backup take so long? Is it bandwidth between the two
> machines or something else?
You have a good point here. From the data given - none - we can't even begin
to guess whether the long backup times are a flaw in design or in
implementation. Very, very likely, backups *shouldn't* be taking 3 days to
finish. I don't know what you are backing up, but apparently it is not
exactly close to static. A three day duration backup won't give you anything
even close to a consistent snapshot of your backup set (unless you are using
file system snapshots, obviously). Are the backup times plausible for the
amount of data? Should you be splitting your backups between multiple
BackupPC servers? I'd suggest fixing the issue rather than trying to
awkwardly work around it.
> [...]
> Other than that, I don't think there is any way to automatically do more
> incrementals, short of increasing the FullPeriod to a higher value....
I should hope there isn't ;-). Increasing the FullPeriod makes sense, because
it corresponds to a *common* requirement: I need a precise reference point
every N days (e.g. once a month). Of course, *in BackupPC*, a full backup is
also a backup I can keep for a long time. I can't do that with a BackupPC
incremental.
Hope that helps.
Regards,
Holger
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