Requirements for using RAC databases with SnapManager
You must know the recommendations for using Real Application Clusters (RAC) databases with SnapManager. The recommendations include port numbers, passwords, and authentication mode.
In database authentication mode, the listener on each node that interacts with an instance of the RAC database must be configured to use the same port number.
The listener that interacts with the primary database instance must be started prior to initiating a backup.
In operating system authentication mode or an Automatic Storage Management (ASM) environment, the SnapManager server must be installed and running on each node in the RAC environment.
The database user password (for example, for a system administrator or a user with the sysdba privilege) must be same for all the Oracle database instances in a RAC environment.