Copyright © 1999, 2013, Oracle and/or its affiliates. All rights reserved.
Legal Notices
This illustration shows the Oracle database with Oracle RAC architecture for a partitioned three-node database.
An Oracle RAC database is connected to three instances on different nodes. Each instance is associated with a service: HR, Sales, and Call Center. The instances monitor each other by checking heartbeats. Oracle Net Services provide client access to the Application/Web server tier at the top of the figure.
End of description.