Practical Issues Related to Disk Scheduling for Video-On-Demand Services

Ilhoon SHIN  Kern KOH  Youjip WON  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.5   pp.2156-2164
Publication Date: 2005/05/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.5.2156
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Multimedia Systems for Communications" Multimedia Systems for Communications
VOD,  cycle-based disk scheduling,  cycle length,  prefix caching,  

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This paper discusses several practical issues related to the provision of video-on-demand (VOD) services, focusing on retrieval of video data from disk on the server. First, with regard to system design, the pros and cons of cycle-based scheduling algorithms for VOD servers are compared, and an adequate policy according to system configuration is presented. Second, we present a way to tune the cycle-based scheduling algorithm so that it maximizes profit. Third, a method to overcome the cons of cycle-based scheduling algorithms is proposed, and its cost is analyzed.