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The Oracle Business Intelligence system logical architecture comprises a single integrated set of manageable components called the Oracle BI domain which can be installed and configured to work together on a single host or can be clustered across multiple hosts for performance and availability.

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Oracle Fusion Middleware General Architecture

After you install and configure an Oracle Fusion Middleware software (BI or not), your environment contains the following:

• An Oracle WebLogic Server domain. You can see it as a Virtual Machine Server that host servers. The first one contained is the Administration Server (ie weblogic) and the second one is the Managed Servers.
• As our environment includes system components, one or more Oracle instances (For BI, the BI instance refers to the System components (coreapplication) of a BI domain)
• A database that is used as a metadata repository, as the components require one.

Oracle Fusion Middleware provides always two types of components:

• Java components
• and system components

and they are are peers.

They are managed mainly by this two adminstrative user interface (installed in the Administration Server):

• WebLogic Server Administration Console — which provides advanced management for Weblogic, Java components (JEE) (BI Publisher, MapViewer, …), and security.
• Fusion Middleware Control (aka Enterprise Manager) — which is used to manage the system components (C++, JSE) (BI Server, BI Presentation Services, Scheduler, ….)

Oracle BI EE Single Instance Architecture

Documentation / Reference

• Oracle BI EE Component Architecture for the picture Oracle BI EE Single Instance Architecture