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Re: Backup-Question
2006-11-23 11:44:30
On Thu, 23 Nov 2006 at 5:18pm, Arno Seidel wrote
just a simple question about the backup behavior of amanda.
Amanda backups on every backup run not the whole file-system just
a part (in percent) depending on the dump-cycle and the size.
does amanda collect every file which changes between the last backup run and
the actual run?
or only the changed files from the last part of the full dump?
or every file which changes to the last complete full dump?
and how does Amanda recognize if a file has changed ... only throu
timestamps?
Standard answer #1: Amanda doesn't do backups -- amanda schedules them.
Bits are actually gotten off the disks by the program you specify in the
disklist, generally either GNUtar or a filesystem-specific 'dump' program.
The man pages of those utilities will explain in great detail how they
determine what to backup and when.
In general, a level 1 backup means everything that has changed since the
last level 0. A level 2 means everything that has changed since the last
level 1. Etc.
--
Joshua Baker-LePain
Department of Biomedical Engineering
Duke University
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