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RMAN - duplicate target database for standby dorecover

Oracle Database Tips by Donald Burleson

Oracle Data Guard- Recovery Manager and Data Guard

Creating an Image Copy of the Primary Database

After this script is executed, exit from RMAN, open the primary database and execute the following statement to archive the latest SCN:


Duplicate and Recover as Standby Database

Use the following command to duplicate the primary database from an image copy and recover it. The duplication process will create the standby database. Before starting the duplication process, the Oracle instance should be started, but it should not be mounted. Then, connect to the auxiliary and target database using RMAN and issue the duplicate command as shown below:

DBA@jrbk01; rman auxiliary / target sys/change_on_install@appsdb

            If the Oracle instance is on remote host, copy the image copies to the remote host in the same directory structure. The file system mount option can be used to facilitate it.

Once the database is duplicated, start the managed recovery process and test the newly created Oracle instance as described in the previous section.

Backup of a Oracle instance Using RMAN

According to the information presented in earlier chapters, it is clear that a Oracle instance can take the load of the backup operation from the primary database. In fact, offloading the backup operation to the standby site is a preferred solution to reducing the computing resource consumption on the primary database. The data files and archived redo log files can be backed up on the standby site, and those backed up files can be used to recover the primary database. However, the control file of the Oracle instance cannot be used to recover the primary database.

The above text is an excerpt from the book: Oracle Data Guard Handbook

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