Re: FW: backing up rman catalog for disaster recovery

Actually, RMAN always writes to the control file before it updates the catalog. So even if you do an RMAN backup using a catalog, you can still recover the database using only the controlfile. Now, in Oracle8i I had problems recovering the control file from the RMAN backup, so I just cheated and backed up the control file separately after the RMAN backup completed, and made sure the control file backup was on the same tape as the RMAN backup. I have performed many recoveries using this method.

Dennis Williams

On 5/25/05, Ruth Gramolini <rgramolini_at_tax.state.vt.us> wrote:
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>=20
> One very easy way is to do an rman backup with the nocatalog option. Thi=
s
> will use controlfile info for restores and recoveries. You can use all t=
he
> options of rman, just no catalog. That is what we do.
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> Just my $0.02,
> Ruth
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> -----Original Message-----
> From: Paula_Stankus_at_doh.state.fl.us
> [mailto:Paula_Stankus_at_doh.state.fl.us]
> Sent: Wednesday, May 25, 2005 4:49 AM
> To: Paula_Stankus_at_doh.state.fl.us; rgramolini_at_tax.state.vt.us;
> all_about_oracle_at_hotpop.com; oracle-l_at_freelists.org
> Subject: RE: backing up rman catalog for disaster recovery
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>=20
> I am setting up a disaster recovery site and I was thinking about the
> best way to do this.
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> My theory is that I would like to not just use another recovery catalog
> on the DR site to backup my primary catalog but to somehow keep these
> catalogs constantly in-synch so when I do need to do complete recovery
> and only have the secondary rman catalog available - I wouldn't have to
> recover the catalog as all of the previous backups would be found there.
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> So....should I do this using Oracle Data Guard on my disaster recovery
> site catalog or backup rman then restore as my first procedure? Any
> advice?
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