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Re: RMAN in NOCATALOG mode?

From: Tanel Poder <tanel.poder.003_at_mail.ee>
Date: Thu, 18 Sep 2003 07:30:05 -0800
Message-ID: <F001.005D061F.20030918073005@fatcity.com>


Hi!

> Denham
> Whether you need to back up the control file depends on whether you can
> recover the database without it. On Oracle8i, I gave up trying to extract
> the controlfile from the RMAN backup, and simply back the controlfile up
> after the backup completes. Others on this list have reported they were
able
> to extract the controlfile from the RMAN backup. I believe that on
Oracle9i
> this is much improved. The important thing is that you validate your
backup
> regularly because an untested backup can't be trusted.

In 9i RMAN you can "configure controlfile autobackup on" - that way RMAN always backs up controlfile as well during any backup. You just have to note that if you configure controlfile autobackup on, then this is remembered in controlfile and during several physical database operations like adding datafile, creating/dropping tablespace, taking tablespace/datafile online a controlfile backup is also created (default location $ORACLE_HOME/dbs or database). If you don't take it into account you could have hundreds of old controlfiles lying around if your environment involves a lot of physical structure changes (transportable tablespaces, read only/read write tablespaces etc).

Tanel.

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Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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Received on Thu Sep 18 2003 - 10:30:05 CDT

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