BackupPC-users

Re: [BackupPC-users] simple backup scheme, 1xfull, 6xinc

2013-10-04 15:26:03
Subject: Re: [BackupPC-users] simple backup scheme, 1xfull, 6xinc
From: Timothy J Massey <tmassey AT obscorp DOT com>
To: "General list for user discussion, questions and support" <backuppc-users AT lists.sourceforge DOT net>
Date: Fri, 4 Oct 2013 15:18:30 -0400
Les Mikesell <lesmikesell AT gmail DOT com> wrote on 10/04/2013 02:20:19 PM:

> Are all of your backup runs completing every day?

That is also a great question.  If your incrementals span more than a week, there will be more than one full that they depend on.  All of the assumptions you've put in place only work if the backups run exactly the way they're supposed to;  if you do not actually *complete* 6 incrementals between your fulls, you will have more than 2 full backups!

For testing purposes, I would set FullKeepCnt to 1 and IncKeepCnt to 1;  then you know that there will be only one full that will be kept by the incremental (meaning that you will bounce between one and two full backups).

While you're at it, set FullPeriod to 1.97 to accelerate the testing process.

Then let it run.  You should start with 1 full after day 1, then 1 full 1 inc after day 2, then 2 full 1 inc after day 3, then 1 full 1 inc after day 4, and then alternate between those last two states.

Another way of testing this would be to back up a *MUCH* smaller chunk of data:  say, a few GB.  Then let it run with your normal settings and confirm that everything works like it's supposed to.  Then you can expand the amount of data you back up and see how the space is used on your backup disk to see if everything is going to fit.

Tim Massey

 
Out of the Box Solutions, Inc.
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