Use
You can use
BRBACKUP to back up the data files and control files of the Oracle Standby Database.A major advantage of the standby database is that you do not have to perform backups on the primary (that is, production) database. Instead, you can perform the backup on the standby database using BRBACKUP. This means that the database backup does not add to the load on the primary database host. Since there is no online operation on the standby database, all host resources are available for the database backup.
Prerequisites
Features
The following graphic shows how backup occurs in a standby database:
See also:
Structure-Retaining Database Copy