On Fri, 19 Sep 2008 10:30:39 +0800 "Lee Amy" <[EMAIL PROTECTED]> wrote:
> I'm going to have some simulation test on 117-102 and encounter a > question by following words. > > Your company has a backup plan which consists in three levels. Once a [..] > I don't know how to answer. Can anyone tell me how to answer this > question and tell me why? The question gives no information about the backup program it is referring to. The words "level" and "incremental backup" could lead to the idea that the author meant the tools "dump" and "restore". These tools are provided for most Linux distributions using ext2fs/ext3fs. There are also specal versions for reiserfs. "man dump" should give you an idea how these tools work. If you have already used other backup tools the information might help that the tools and their man-pages make no difference between "incremental backup" and "differential backup" like other backup systems do although dump/restore can provide both. A backup with increased level number is called incremental in the terms of dump/restore, but each of a series of incremental backups of the same level number is actually a differential backup referred to the preceding backup with lower level. On other backup systems "incremental backup" usually means "all files changed since last backup". In the world of dump/restore this is only true for the first backup of a series of backups with higher level. -- Gruß, Tobias. _______________________________________________ lpi-discuss mailing list [email protected] http://list.lpi.org/cgi-bin/mailman/listinfo/lpi-discuss
