Administration Services is a three-tiered system:
Client tier (Administration Services Console): A Java-based client console, which runs only on Windows platforms, provides a user interface that you use to manage the Essbase environment.
Middle tier (Essbase Administration Server): A Java server, which Essbase Administration Server runs on any platform supported by Essbase, maintains communication, session, and security information for Essbase Server connections, thus coordinating interactions and resources between the database and client tiers.
Database tier (Essbase Server): One or more Essbase Servers, which are installed separately from Administration Services, store and process multidimensional database information.
Administration Services can be deployed in various scenarios. For example, Administration Services components (Administration Services Console and Essbase Administration Server) and Essbase Server can be installed on the same computer or on different computers. See the Oracle Hyperion Enterprise Performance Management System Installation and Configuration Guide for more information about deployment scenarios.