On Tue, 26 Nov 2002 at 7:30pm, Nitesh Kumar A. wrote > I am really excited to know more about AMANDA now. > > What I understand is that, first amanda will take a level 0 backup (full > backup) and then for the following days, it will take level 1.
Usually. If the level 1s get too big, it may "bump" them to 2s or higher. > If suppose, amanda takes level 0 on sunday and then level 1, with respect > to 0 on mon/tue/wed/thu/fri/sat. > > Now I have files named a, b, c, d, e, etc on my filesystem. I have the > full backup on sunday. > > File "a" is modified on monday, so the level 1 backup on monday will just > have file "a". > > File "b" is modified on tuesday, so the backup on tuesday will have just > file "b" but not file "a" due to just level 1 backup. That's incorrect. A level 1 backs up everything changed since the last level 0. So Tuesday night's backup will have "a" and "b". > At some point of time, if I want to backup all the files, then I have to > contact all the tape drives. Is this the case? Or will amanda tell me on > which tape drives are these files located? How do I search for a > particular file in the backup? The program "amrecover" offers a ftp-like interface to the backups. You tell it what files you want (and from which data), and it'll tell you what tapes you need. > So if just file "a" is written into the tape drive1, how can we use the > rest of the space on the tapedrive1? Amanda does not append to tapes -- you'll need to change tapes each day. For more, please go read the amanda chater from "Unix Backup & Recovery", available at <http://www.backupcentral.com/amanda.html> as well as the docs in the amanda tarball. They'll explain a lot of these basic concepts. -- Joshua Baker-LePain Department of Biomedical Engineering Duke University
