RMAN duplexing Tips

Oracle Database Tips by Donald BurlesonMarch 23, 2015

Question: How do you duplex an RMAN backup?

Answer: You can duplex an RMAN backup

Here we see that the current configuration is for disk based backups using backup sets. Notice that currently the data file and archive log backup copies are set to 1.

RMAN> show all;
. . .
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default

Note that the configure backup copies specifies how many copies to of each backup piece to create during the RMAN backup. Below we change the configure commands to change the number of copies to 2.

RMAN> CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2;

new RMAN configuration parameters are successfully stored

RMAN> CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 2;

new RMAN configuration parameters are successfully stored

Next, we add a new duplexed backup location:

RMAN> CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT '/u01/app/oracle/oradata/backup1/%U', '/u02/app/oracle/oradata/backup2/%U'

. . .

new RMAN configuration parameters are successfully stored

RMAN will now duplex the copies of the RMAN backups. Be aware that you will now require double the space to store the duplexed backups.

Oracle Training from Don Burleson

The best on site "Oracle training classes" are just a phone call away! You can get personalized Oracle training by Donald Burleson, right at your shop!

Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals. Feel free to ask questions on our Oracle forum.
Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.
Errata? Oracle technology is changing and we strive to update our BC Oracle support information. If you find an error or have a suggestion for improving our content, we would appreciate your feedback. Just e-mail:
and include the URL for the page.

Burleson Consulting

The Oracle of Database Support
Oracle Performance Tuning
Remote DBA Services

Copyright © 1996 - 2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.

��