Oracle^® Business Intelligence Enterprise Edition Deployment Guide > Clustering, Load Balancing, and Failover in Oracle Business Intelligence >

Clustering of Oracle BI Components of the Presentation Layer

Multiple BI Presentation Services instances may be installed and configured to participate in the Oracle BI deployment to service a large volume of users and to provide for high availability. Note that the multiple BI Presentation Services are not controlled by the BI Cluster Controller. The BI Presentation Services instances in the Oracle BI deployment may either share a common Presentation Catalog on a shared file system or the Presentation Catalog may be replicated across the BI Presentation Services instances.

NOTE:  Refer to the Oracle Business Intelligence Presentation Services Administration Guide for detailed information on replicating the Presentation Catalog.

The Oracle BI Javahost component provides services to BI Presentation Services for Charts, Gauges and PDFs based on a request-response model. BI Javahost is installed along with each instance of BI Presentation Services, and by default BI Presentation Services communicates requests to its local BI Javahost instance. The clustering capability of the Presentation layer offers the ability to cluster the BI Javahost instances installed along with each instance of BI Presentation Services so that requests to BI Javahost are load balanced to the cluster.

Native load balancing and failover capability is provided for the components of the Presentation layer. This capability supports load balancing and failover for the following component connections:

• BI Presentation Services Plug-in to multiple BI Presentation Services instances
• BI Presentation Services to multiple BI Javahost instances
• BI Scheduler to multiple BI Presentation Services instances
• BI Scheduler to multiple BI Javahost instances