This figure shows the host and database names used in the Disaster Recovery topology described in this section. The left side of the figure shows the production site and the right side shows the standby site. Note that neither the production site or standby site uses a Real Application Clusters database to store the Metadata Repository schemas for the Oracle Application Server instances in the site. Note that one to many Oracle Application Server instances could exist at the production site and at the standby site, so the figure does not depict a set number of instances for each site but instead has text that states the instances at each site access their configuration data in the Metadata Repository schemas in the database below.

The primary site includes a single host, which has a physical hostname of prodnode1 and a virtual hostname of vhostdr. This host uses a DB SID of orcl to access the physical database for the production site that is depicted at the bottom of the production site. The production site database has a database name of orcl.oracle.com. The database for the production site is not a Real Application Clusters database.

The standby site includes a single host, which has a physical hostname of standbynode1 and a virtual hostname of vhostdr. This host uses a DB SID of orcl to access the physical database for the standby site that is depicted at the bottom of the standby site. The standby site database has a database name of orcl.oracle.com. The database for the standby site is not a Real Application Clusters database.