On Wed, Aug 17, 2005 at 09:13:22AM -0400, Mangala Gunadasa wrote:
> Greetings
> 
> We have been using amanda for many years. Our capacity had grown and
> currently we are backing up 60 file systems across 12 servers. The
> backup takes 9hrs to finish. We have tried to make it more efficient by
> changing the parameters "interface", and "net usage" of the amanda.conf
> and did not succeed( Probably those parameters do not matter). We would
> like to perform Full backup every Day to a SDLT Tape drive.
> We will be adding 2 IBM P570's and we are concerned about the duration
> of the backup. Can we find how the big sites manage this type of
> situation?. I appreciate any comments on this subject.

Seconding Dave's comments, figure out what pieces of the backup take time.

One additional thought, see if the estimate phase is an appreciable
part of the total time.  As you are doing full backups daily, I presume
you have a pretty good idea of the amount of data daily.  In that case
newer versions of amanda have alternatives to the estimate phase that
can greatly speed up that part of the backup.

-- 
Jon H. LaBadie                  jon AT jgcomp DOT com
 JG Computing
 4455 Province Line Road        (609) 252-0159
 Princeton, NJ  08540-4322      (609) 683-7220 (fax)