RE: To reduce RMAN backup time

From: Hollis, Les <Les.Hollis_at_ps.net>
Date: Thu, 16 Jun 2005 15:30:57 -0500
Message-ID: <683E0A1C82D75246BD9F4E01F77CBB0FB5EF81@pscdalpexch02.perotsystems.net>

Configure device type disk parallelism 2;

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Roger Xu Sent: Thursday, June 16, 2005 3:05 PM
To: Oracle-L_at_Freelists. Org (E-mail)
Subject: RE: To reduce RMAN backup time

I am trying to find out why "2 channel / 2 filesystem / 2 controller" does not faster than "1 channel " ?
Anything I need to set in RMAN? pool size? buffer size?

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[ mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Roger Xu Sent: Thursday, June 16, 2005 2:27 PM
To: Oracle-L_at_Freelists. Org (E-mail)
Subject: To reduce RMAN backup time

Hi list,
I am trying to reduce RMAN backup time by streaming backup to 2 different filesystem on two difference controller.

But it ended up taking a little bit longer than backup to 1 filesystem.

Any comments?

Thanks,

Roger Xu

P.S.

run {

allocate channel t1 type disk format
'/oback/obckp1/datafiles/PR2_%s_%p.data';

allocate channel t2 type disk format
'/oback/obckp2/datafiles/PR2_%s_%p.data';

backup

(database include current controlfile);

backup

format '/oback/redo-logs/PR2_%s_%p.logs'

archivelog all;

}

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http://www.freelists.org/webpage/oracle-l Received on Thu Jun 16 2005 - 16:36:19 CDT