Performance analysis of video storage server under initial delay bounds

Previous studies on video storage servers focused on improving the disk thr oughput and reducing the server buffer size. However, the initial delay of a new request, one of the most important quality of service (QoS) parameter s from the users' point of view, is almost neglected while designing a stor age subsystem or evaluating its performance. For different types of video-o n-demand (VOD) services such as interactive video game, digital library, or movie-on-demand system, the initial delay can vary from 0.5 s to 5 min. Th is criterion brings some impacts on designing a storage server for a partic ular VOD application. In this paper, we investigate the storage server desi gn and the performance evaluation of VOD systems with different initial del ay guarantees. We propose a new performance model on evaluating the efficie ncy of a video storage server so that a cost-effective configuration can be easily obtained under a specified initial delay bound. (C) 2000 Published by Elsevier Science B.V. All rights reserved.