Providing Guaranteed Quality of Service for Interactive Visualization Applications Wai-Man R. Wong and Richard R. Muntz Computer Science Department Universityof California, Los Angeles waiman,muntz @ cs.ucla.edu INTRODUCTION Recently, adyances in hardware technology have enabled a new t y p e of application - - i n t e r a c t i v e v i s u a l i z a t i o n s . One example is the 3D Urban Simulation system (USim) developed at UCLA [1], in which, users can navigate through various neighborhoods and inspect realistic architectural models of buildings in a virtual-reality-like environment in realtime. The d a t a set for a urban model is often huge (more than 1TB). However, by spatially dividing a urban model into individually reconstructible scene objects, only a relatively small portion of the d a t a set (usually a few tens of MB) is actually needed by the application at any one time to generate the current display image during a user session. Therefore, it is possible to build a storage server, similar to a video-on-demand (VOD) server, which holds the entire model d a t a set; and have the
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