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Home -> Community -> Mailing Lists -> Oracle-L -> RE: RMAN - Remote vs Local Backups
-w.
The method I use to perform the RMAN backup is different than the
question you posed.
Box-a is the database(target). OpenVMS - Production server
Box-b is the repository(catalog) database. OpenVMS - Development
server
Box-c is the controling(cron source). Linux - play and learn server.
I have the Box-c cron run the RMAN commands and connect to the target and catalog servers. The box-c RMAN then initiates the backup level0 and level2 at different days that I set in the cron. The log of events are stored on the box-c ( for ease of reading and access) The RMAN backups are stored on the box-a disks eliminating network traffic and ease of restoral if needed. Box-a has a large storage capacity for the RMAN backups and the backups are copied to tape nightly by the os backup. The network traffic is as follows:
box-a to box-b catalog information only. box-a to box-c RMAN commands and log info. box-c to box-b RMAN commands.
Let me clarify what I'm seeking. In my example, I am using a centralized catalog which is on its own dedicated database/server and backups are to tape. BCV's are not involved.
Normally, in my experience, RMAN backups are initiated from the target server via a cron job. But, I've seen a case where a cron job for an RMAN backup was run from a box that was different from the database server machine. I find this configuration strange and confusing because it implies this was done for a "reason" and makes life difficult to find out where all the backups are running from.
In the scenario of backing up the database on box A via an rman/cron job on box B, is this particular configuration more network resource intensive and therefore slower versus the backup being initiated from the same machine as the database? If not, could someone explain why?
Does this make sense?
Thanks again.
-w
DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM> wrote:
Walter - As RMAN was introduced in Oracle8i, that was the ideal. I
think
Oracle viewed RMAN as a high-level feature that would help you manage
the
backups for large server farms. They emphasized that the catalog was
the way
to go. With the catalog on another box, if the server was toasted, you
could
slide another system into that spot and with a couple of RMAN commands
you
could have that up and going again. Obviously if you use the catalog
method
on the box you are backing up, you must have a second instance, and
even
then you introduce more vulnerabilities than the configuration where
the
catalog is on another server.
With Oracle9i, Oracle added many of the features that were only
available in the catalog method to the control-file method. According
to my
Oracle Education Instructor John Hibbard who is pretty plugged into
these
things, Oracle is trying to emphasize that the catalog method may not
suit
everyone's situation and the control file method may best suit your
needs.
As others on this list have pointed out, not all conference speakers
have
gotten that message.
Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
dwilliams_at_lifetouch.com
-----Original Message-----
Sent: Thursday, May 29, 2003 11:55 AM
To: Multiple recipients of list ORACLE-L
Hi,
Can anyone think of a reason(s) why one WOULD want to backup a database
from
a box other than the database box itself? Are there any advantages to
this
kind of configuration?
For example:
Box-A (production db server)
Box-B (rman db server)
A cron job runs on Box-B which backups up the database from Box-A.
Thanks in advance!
-w
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: DENNIS WILLIAMS INET: DWILLIAMS_at_LIFETOUCH.COM Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Ron Rogers INET: RROGERS_at_galottery.org Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Fri May 30 2003 - 07:33:26 CDT
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