Thanks to all.



-----Original Message-----
From: Ed Wilts [mailto:ewilts AT ewilts DOT org] 
Sent: Monday, April 17, 2006 3:48 PM
To: Deiter Scott
Cc: veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] rman performance.

On Mon, Apr 17, 2006 at 02:14:05PM -0400, Deiter Scott wrote:
> 
> We are beginning the setup for hot backups for our large databases.
> The simple single threaded setup takes over 28 hours to run.
> We need to run the backup to two tapes concurrently.  
> 
> Solaris 9 master/media server
> L80 storagetek library with SDLT
> Solaris 9 client with oracle 9
> 
> The policy has a limit of 8 jobs
> The schedule has multiplexing set to 4.
> 
> The rman script allocates two channels.  We are now running two jobs per
> backup. However, they are streaming to the same tape.  I know there is a
> manual for this and I have not found it yet.
> 
> How can we get four jobs running to two tapes?

Set multiplexing to 2.  When the 4 jobs start, they'll allocate 2 tape
drives.  However, if you start only 2 jobs at once, they will multiplex
to a single drive.

        .../Ed

-- 
Ed Wilts, Mounds View, MN, USA
mailto:ewilts AT ewilts DOT org