Before setting up the databases:
Install the Replication Server that manages the active and standby databases. A single Replication Server manages both the active and the standby database.
Set up ECDA or ExpressConnect for Oracle connectivity. If using ECDA, one copy at primary site and one copy at standby site must be running and configured to communicate with the Oracle databases.
Configure the Replication Agent, and verify that it is running in Admin mode for both the active and the standby database.
Define the DDL user name in both the active and the standby database, and verify that it is configured in both the Replication Agents.The ddl_username parameter is the database user name included in LTL for replicating DDL commands to the standby or target database. This user must have permission to execute all replicated DDL commands at the target database. The DDL user must be different from the maintenance user. In addition, the DDL user must also have alter session permission to execute the DDL command as the user who executed at the active database. The ddl_password parameter is the password corresponding to the database user name.
