Discoverer topology with a single instance Discoverer topology with multiple instances

6-2 Oracle Fusion Middleware Configuration Guide for Oracle Business Intelligence Discoverer

6.1.1 Discoverer topology with a single instance

When you install Discoverer, you create a Discoverer topology within a single instance, as shown in Figure 6–1 . After installation, you can configure other types of topologies for Discoverer. If Oracle Web Cache is present then it communicates with the Oracle HTTP Server, which handles requests from Web browsers. The Oracle HTTP Server communicates with the WebLogic Managed Server, WLS_DISCO. The Discoverer Java EE application is deployed to WLS_DISCO. The WLS_DISCO component is related to the Oracle Internet Directory and the Discoverer schemas for installations that are not standalone. The WLS_DISCO component communicates with the Preference Server, which stores and maintains Discoverer preferences. Figure 6–1 Discoverer topology for a single instance

6.1.2 Discoverer topology with multiple instances

You can create a Discoverer topology with multiple instances, in which all instances communicate with a single Preference Server in one of the instances, as shown in Figure 6–2 . In a multiple-instance environment, during installation, you must add managed servers for each Discoverer instance using the Expand Cluster option. All managed servers where Discoverer applications are deployed must be in the same cluster. For more information about installation, see Oracle Fusion Middleware Installation Guide for Oracle Portal, Forms, Reports and Discoverer. The topology in Figure 6–2 includes two instances in one cluster. For load balancing between multiple instances, either all or none of the instances must be associated with the Oracle Internet Directory and the Discoverer schemas. The managed server component in each instance communicates with the single Preference Server. Therefore, the same set of preferences are applied to the Discoverer component in each instance. The instances can exist on the same machine or on two different machines. For more information about WebLogic Server clusters, see Oracle Fusion Middleware Using Clusters for Oracle WebLogic Server. Managing Discoverer in a Multi-Machine or Multi-Instance Environment 6-3 Figure 6–2 Discoverer topology for a multiple-instance environment

6.2 About Discoverer topologies in a multiple-machine or multiple-instance environment