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Home -> Community -> Mailing Lists -> Oracle-L -> RE: RMAN - To Catalog or not to catalog, that is the question
i would agree freeman's book was instrumental when we moved over to rman.
it has very specific sections to the vendor products ,legato,veritas and tivoli which lear up a lot of confusion.
DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM> wrote:
Julio
Thanks for the explanation. When I said "hot backups", I was referring to
the older , non-RMAN method of backing up Oracle while the database was
open. I tried that years ago. If this list was available then, I have no
doubt that I could have received some excellent advice that would have
helped me overcome my difficulties. But that is water under the bridge.
To avoid confusion, I think Oracle has tried to suggest the term on-line
backup for RMAN backups while the database is open. That is the only type of
RMAN backup I have performed because I figured that was the only thing that
made RMAN worthwhile. And I appreciate the help that people on this list
provided in helping me understand the sometimes obscure RMAN documentation.
While I'm on topic of documentation, if you are going to tackle RMAN,
purchase Robert Freeman's great book Oracle9i RMAN Backup & Recovery.
Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of QuijadaReina, Julio C
Sent: Wednesday, June 09, 2004 9:51 AM
To: oracle-l_at_freelists.org
Subject: RE: RMAN - To Catalog or not to catalog, that is the question
Dennis,
Thanks. Sorry, I should have elaborated a little bit more...In your post
you said:
>I never got hot backup working, so I can't respond to that issue.
And so, I just wanted to point out that in the process I use my prod db is never shut down and that it is not too hard to get hot backups to work with RMAN on 9.2.0 if you ever would like to try it ;-)
Regards,
Julio
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of DENNIS WILLIAMS
Sent: Wednesday, June 09, 2004 10:36 AM
To: 'oracle-l_at_freelists.org'
Subject: RE: RMAN - To Catalog or not to catalog, that is the question
Julio
Congratulations. Is there a point here somewhere?
Dennis Williams
DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of QuijadaReina, Julio C
Sent: Wednesday, June 09, 2004 9:34 AM
To: oracle-l_at_freelists.org
Subject: RE: RMAN - To Catalog or not to catalog, that is the question
Dennis,
I have three databases on 9.2.0 (prod, train, and recovery catalog) and use OS schedule jobs to run a couple of scripts, which do the following:
Once a week, I copy prod into train using the 'dup' command. And just for giggles...I connect to train Monday morning to check I got a fresh copy of prod and it has been faithful since.
At no point in this process a shut down my prod db.
Kind regards,
Julio
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of DENNIS WILLIAMS
Sent: Wednesday, June 09, 2004 9:46 AM
To: 'oracle-l_at_freelists.org'
Subject: RE: RMAN - To Catalog or not to catalog, that is the question
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_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On
Behalf Of Smith, Ron L.
Sent: Wednesday, June 09, 2004 8:29 AM
To: oracle-l_at_freelists.org
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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