Oracle® Database Backup and Recovery Advanced User's Guide 10g Release 2 (10.2) Part Number B14191-02 |
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Run the CONFIGURE
command to enable and disable backup optimization. Backup optimization skips the backup of files in certain circumstances if the identical file or an identical version of the file has already been backed up. Full details on the backup optimization algorithm are provided in "Backup Optimization".
Note that backup optimization applies only to the following commands:
BACKUP
DATABASE
BACKUP
ARCHIVELOG
with ALL
or LIKE
options
BACKUP
BACKUPSET
ALL
You can override optimization at any time by specifying the FORCE
option on the BACKUP
command. For example, you can run:
BACKUP DATABASE FORCE; BACKUP ARCHIVELOG ALL FORCE;
By default, backup optimization is configured to OFF
. To enable backup optimization, run the following command:
CONFIGURE BACKUP OPTIMIZATION ON;
To disable backup optimization, run the following command:
CONFIGURE BACKUP OPTIMIZATION OFF;
To clear the current backup optimization setting, that is, return backup optimization to its default setting of OFF
, run this command:
CONFIGURE BACKUP OPTIMIZATION CLEAR;
See Also:
"Backup Optimization Algorithm" for the complete criteria that determine whether a file is identical and the conditions under which backup optimization is operative
"Backing Up Files Using Backup Optimization" for examples of how to optimize RMAN backups
You can use SHOW BACKUP OPTIMIZATION
to view the current settings of backup optimization as configured with the CONFIGURE
BACKUP
OPTIMIZATION
command. After connecting to the target database and recovery catalog (if you use one), issue the SHOW
BACKUP
OPTIMIZATION
command. For example, enter:
SHOW BACKUP OPTIMIZATION;
Sample output for SHOW
BACKUP
OPTIMIZATION
follows:
RMAN configuration parameters are: CONFIGURE BACKUP OPTIMIZATION ON;