RE: RMAN - To Catalog or not to catalog, that is the question

  • From: DENNIS WILLIAMS <DWILLIAMS@xxxxxxxxxxxxx>
  • To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 9 Jun 2004 08:46:18 -0500 

Ron
    Joe and Fuad make some excellent points, so I won't repeat those.
    I never got hot backup working, so I can't respond to that issue.
Perhaps someone else on the list can. My gut reaction is that if you have
something that works, has been tested, and you trust, then stick with that.
 
As far as RMAN catalog or not, I would make the following points:
   - Nocatalog (controlfile mode) was enhanced considerably in 9i.
   - Catalog can give you a central view of all backups across your system.
For example, on 9i I went nocatalog and have a script that sends me the
success/failure. But if somehow the cron job stops working, I might not
notice that I didn't receive an email.
   - Catalog mode can make upgrades frustrating. In general the catalog
database must be kept at a level ahead of the target databases.
   - Even in catalog mode, the backup information is still stored in the
controlfile, so you can still perform a distaster recovery without using the
catalog. That is my standard procedure.
   

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On
Behalf Of Smith, Ron L.
Sent: Wednesday, June 09, 2004 8:29 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: RMAN - To Catalog or not to catalog, that is the question 


We are getting ready to start using RMAN on several new 9i Linux databases.
I guess the first question would be is RMAN really that much better then
using home grown dynamic hot backup scripts?  We have developed these for
our Oracle/NT environment and they seem to work fine.
The second question would be should we use a recovery catalog?  The catalog
seems to add a lot of complexity to the setup and to a disaster recovery
plan.
 
Thanks!
Ron

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