Modeling Rate-Based Dynamic Cache Sharing for Distributed VOD Systems

Authors:
B. Sonah;M. R. Ito
Affiliations:
-;-
Venue:
ITCC '00 Proceedings of the The International Conference on Information Technology: Coding and Computing (ITCC'00)
Year:
2000

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Abstract

A distributed VOD system includes several VOD subsystems, each VOD sub-system consisting of an archive server (AS), a continuous media server (CMS) and a medata DB. A VOD sub-system employs an object replacement algorithm by which a video is selected to be replaced by a new video. Upon a miss, the VOD system must decide onto which CMS to load the new video.In this paper, we address this issue by modeling a dynamic approach of logically sharing the overall CMS cache space among the CMS's based on the current average arrival rate of requests at each VOD sub-system to achieve superior cache performance Our simulation results show that dynamic cache sharing is a means by which hit performance at the CMS's can be improved.