I asked that very question a couple of weeks ago! In my undrstanding, the answer was thus:
An incremental backup relies on modification datestamp to know what to back up, and the method is not infallible. Depending on the transfer method, it can miss the odd update. Also, it gets more and more complex for BackupPC to assemble the complete file list as you get further away from the full. I believe these would be the same with any backup method. A full backup always checks the actual contents of the files (and so it is the only thing that is completely reliable). It also resets you back to base so you have the entire list of files at one level again, thus making it less complex for BackupPC down the road. "Jack" <[EMAIL PROTECTED]> wrote: > I ues a backup system before that had a "incremental forever" backup policy. > The first "incremental" was really a full, and after that, like BackupPC > with rsync, it scanned for changes, and only backedup what it needed to. > Unless you forced it, you never did (or needed to) do a full backup again. > Thi other backup system uses a database to keep its information like MD5 and > permissions, etc, information to know if the file really did change. > > Logically that is what it seems like backuppc is doing. But it really does > do an effective full and incremental like other backup techniques, as I > understand. > > Could someone straighten me out as to what is different here? > > ... OR better, tell me where to Read The Fine Manual to explain this level > of detail! > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > BackupPC-users mailing list > [email protected] > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: http://backuppc.wiki.sourceforge.net > Project: http://backuppc.sourceforge.net/ > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
