Three-tier client/server computing based on the X Window system has been successfully implemented in a variety of application areas, including Esri applications. This complete hardware/software model is based on the tenet of "doing the right thing at the right place." The three levels of this model are ¥ Data Level ¥ Application Level ¥ Display or Presentation Level The Data Level is taken care of by high availability and secure database servers. The Application Level is well suited to high-performance, scalable application servers. The Display Level or user interface in this model is an X capable display such as an X terminal. This model allows you to scale application performance one layer removed from the individual desktop. This provides a relatively effortless administration chore compared to some of the other client/server models. This paper discusses the relative benefits of an X-based three-tier client/server model, including configuration models and case studies to demonstrate use.
Anita Reiner
Hewlett Packard
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Dave Caputo
Hewlett Packard-Panacom
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