Analysis of Caching Performance in Multimedia Servers

N.J. Sarhan and C.R. Das (USA)


Analytical modeling, caching, multimedia, video-on demand (VOD).


The design of multimedia servers faces significant chal lenges to support large numbers of concurrent customers because multimedia data require real-time playback and high transfer rates. These requirements impose heavy bur dens on the underlying storage subsystems and lead to rapid consumptions of network bandwidth. Interval caching is an efficient way to reduce the disk bandwidth requirements in multimedia servers. It can also be applied in conjunction with other techniques in order to reduce the required net work bandwidth as well as to further reduce the disk band width requirements. This paper presents a validated ana lytical model for interval caching and then uses the model to investigate the impacts of various system and workload parameters.

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