Adam Goryachev wrote: > Rob Owens wrote: >> Adam Goryachev wrote: >>> Holger Parplies wrote: >>>> a) rsync full backups are only minimally more expensive than incrementals >>>> in >>>> terms of bandwidth. Still, every file needs to be completely read from >>>> disk >>>> on both sides, so there is a good reason to offer an "incremental" mode >>>> as >>>> a speedup. >>> BTW, 2 x rsync incrementals of the same level will transfer more data >>> than one full + one incremental. So for example, doing 6 incrementals >>> followed by a full backup can in fact transfer a lot more data than >>> doing 7 full backups. >>> >>> eg, if a file changes after the full backup, then each incremental >>> backup will re-transfer those changes. While a full will transfer the >>> changes but the following full/incremental will not re-transfer those >>> changes. >>> >> This situation can be avoided by setting IncrLevels to 1, 2, 3, 4, 5, 6 > >> This way each incremental is based on the previous incremental, and not >> the previous full. (Assuming you get a full backup every 7 days). > > Also assuming you use backuppc 3.0 or newer, which means it is not > available for me as I am using debian stable packages. (Although, I hear > the next debian stable should be out pretty soon, in which case I'll get > the newer version then :) > Yes, that's what it sounds like. It is pretty easy, though, to install backuppc 3.0 on Etch. Just download the package from the debian testing repository, along with libfile-rsyncp-perl (if I remember correctly). There aren't any other dependencies as far as I know -- but I only use rsync as a transport, so there may be some samba stuff to download from testing as well.
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