From: Brien D. <bri...@cg...> - 2007-02-27 22:01:08
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> This is going to be unsupported, I know, but for my own amusement (and possibly yours!) can someone help me understand the ramifications of subverting some of the tar options during the backups?<br> <br> Specifically, take this scenario:<br> <br> #1 full backup of / (tar -cvf - --totals -C / ./)<br> <br> so tar backs up everything, which is simple and works fine.<br> <br> but then, for incrementals, we make our own list of directories that have changes since the last full/inc backup (another program keeps track):<br> <br> #2 incremental of / (tar -cvf - --totals -C / -T <path to a list of dirs that we think have changed files in them><br> #3 same as above, and so on<br> <br> So now, in the web interface, each view is a "hodge-podge"; you will see stuff "filled in" from the last full, since backuppc 2.x assumes (and rightly so) that it is a differential-style backup. I was hoping a restore process would be: restore #1, #2, #3 and it would work (a bit tedious). But I believe that, by #3, you may, in some cases, be restoring some data from the "full" and overwriting what changed from #2. Obviously, restoring a <i>single</i> file would work fine.<br> <br> I thought backuppc 3.x, with the multi-level incrementals would fix this problem (<i>my</i> problem, that is ;-), but as I think about it I don't think it will either, and it's melting my brain in the process.<br> <br> So my problem really isn't the backing up of data, that's fine. It just seems <i>nearly</i> impossible to restore and/or archive the data because I am storing it a somewhat unexpected way (a multi-level incremental <i>without</i> the empty directory structure that tar generates w/ --newer). Any thoughts and/or advice on this, other than the obvious "don't do that!"? :-) <br> <br> brien<br> </body> </html> |