Re: Datagaurd without catalog database

  • From: De DBA <dedba@xxxxxxxxxx>
  • To: andrew.kerber@xxxxxxxxx
  • Date: Wed, 03 Dec 2014 17:16:35 +1000

Andrew,

I'm almost sure I have restored databases without a catalog from a standby 
backup. Can you point us to the actual quote?

Perhaps this has bearings on the problem that Seth had with cloning the 
database from a standby backup some weeks ago, not sure how that ended. I may 
have missed the solution..

Cheers,
Tony

On 03/12/14 13:55, Andrew Kerber wrote:
According to oracle doc if you want to use a backup of the standby to restore 
primary you have to use a recovery catalog.  Not sure why.

Sent from my iPhone

On Dec 2, 2014, at 9:14 PM, Fred Habash <fmhabash@xxxxxxxxx 
<mailto:fmhabash@xxxxxxxxx>> wrote:

I also would like to ask why a recovery catalog needed at all. We do it all the 
time, restore standby backups, recover, then activate using standby CF. With 
primary CF, I can do a full recovery using ORLs and open normal. But this is 
not necessary.
Give me when scenario where a backup on the standby does not protect you from 
assuming there are no gaps in log shipping.

--------
Thank you.

On Dec 2, 2014 11:54 AM, "Seth Miller" <sethmiller.sm@xxxxxxxxx 
<mailto:sethmiller.sm@xxxxxxxxx>> wrote:

    It sounds like a one-off situation. Maybe that client had standby file 
management set to manual. I have never run into this problem and have set up 
this scenario many times. I'm a big advocate of the catalog but it is not 
necessary for offloading backups to a standby.

    Seth Miller

    On Mon, Dec 1, 2014 at 11:01 PM, Syed Jaffar Hussain <sjaffarhussain@xxxxxxxxx 
<mailto:sjaffarhussain@xxxxxxxxx>> wrote:

        Seth,

        One of our clients encountered a wired issue where backups on standby 
failing whenever a new datafile is being added to the primary database. Oracle 
suggested to resync the catalog just before the backups. Therefore, this 
assumes that catalog is required.

        On Mon, Dec 1, 2014 at 7:34 PM, Seth Miller <sethmiller.sm@xxxxxxxxx 
<mailto:sethmiller.sm@xxxxxxxxx>> wrote:

            Syed,

            Please provide more detail on this comment. What capabilities are 
disabled by not having a catalog in place?

            /"If you are planning to offload RMAN backups to your DR databases, 
then, you must use the catalog"/
            /
            /
            Seth Miller


            On Mon, Dec 1, 2014 at 5:13 AM, Syed Jaffar Hussain 
<sjaffarhussain@xxxxxxxxx <mailto:sjaffarhussain@xxxxxxxxx>> wrote:

                Dear Walid,

                If you are planning to offload RMAN backups to your DR 
databases, then, you must use the catalog, otherwise, need not to worry.
                Just a quick question on restore. If you want to restore a 
database to a month back date, how are you going to do it?

                Regards,


                On Mon, Dec 1, 2014 at 10:24 AM, walid kaakati 
<dmarc-noreply@xxxxxxxxxxxxx <mailto:dmarc-noreply@xxxxxxxxxxxxx>> wrote:

                    Hi list,

                    we are configuring a physical standby database without a 
recover catalog database, is this a correct configuration regarding RMAN and 
recovery senarios ? , backups are taken on Primay and standby used only for 
failover.

                    Best wishes to all of you.




-- Best Regards,

                Syed Jaffar Hussain
                Oracle ACE Director 
<http://apex.oracle.com/pls/otn/f?p=19297:4:4640302666204919::NO:4:P4_ID:186>
                Oracle Certified Master (10g) 
<http://education.oracle.com/education/otn/shussain.html>
                Lead-author Expert Oracle RAC 12c 
<http://www.apress.com/9781430250449>
                Co-author Oracle 11gR1/R2 RAC Essentials 
<http://link.packtpub.com/yNZicz>
                *Oracle Magazine DBA of year (2011)*
                OCP 8i/9i/10g/11g DBA, RAC Certified Expert, ITIL V3 foundation 
certified
                Charity : www.sajcharity.org <http://www.sajcharity.org>
                I blog at  : http://jaffardba.blogspot.com/
                LinkedIn : http://www.linkedin.com/in/sjaffarhussain
                Follow me on twitter : http://twitter.com/#!/sjaffarhussain 
<http://twitter.com/#%21/sjaffarhussain>
                --------------------
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-- Best Regards,

        Syed Jaffar Hussain
        Oracle ACE Director 
<http://apex.oracle.com/pls/otn/f?p=19297:4:4640302666204919::NO:4:P4_ID:186>
        Oracle Certified Master (10g) 
<http://education.oracle.com/education/otn/shussain.html>
        Lead-author Expert Oracle RAC 12c <http://www.apress.com/9781430250449>
        Co-author Oracle 11gR1/R2 RAC Essentials 
<http://link.packtpub.com/yNZicz>
        *Oracle Magazine DBA of year (2011)*
        OCP 8i/9i/10g/11g DBA, RAC Certified Expert, ITIL V3 foundation 
certified
        Charity : www.sajcharity.org <http://www.sajcharity.org>
        I blog at  : http://jaffardba.blogspot.com/
        LinkedIn : http://www.linkedin.com/in/sjaffarhussain
        Follow me on twitter : http://twitter.com/#!/sjaffarhussain 
<http://twitter.com/#%21/sjaffarhussain>
        --------------------
        "Winners don't do different things. They do things differently."



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