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Mitigating the Side-effect of Starting New Session in Multimedia Streaming using Multi-zoned Disk  

Cho, Kyeong-Sun ((주)넷앤티비 연구소)
Won, You-Jip (한양대학교 공과대학 전자전기컴퓨터공학)
Shin, Il-Hoon (서울대학교 전기컴퓨터공학부)
Koh, Kern (서울대학교 전기컴퓨터공학부)
Publication Information
Journal of KIISE:Computer Systems and Theory / v.31, no.8, 2004 , pp. 445-452 More about this Journal
Abstract
Zoning technology of disk improved the performance of disk subsystem with increase of storage capacity and average transfer bandwidth. SCAN disk scheduling with double buffering is used to utilize the performance of zoned disk in multimedia system. However, this method has a problem that generates jitter when the number of steams increases. In this article, we propose the novel approach, pre-buffering policy, to overcome this problem. Pre-buffering avoids jitter by buffering the lack of data before starting service, which is estimated from the current cycle length and the maximum cycle length. We can calculate cycle length, data sire needed in each cycle and the possible lack of data caused by the increase of the number of streams using the numerical model of disk subsystem. Pre-buffering can be applied for multimedia systems and contribute to provide clients with high quality service without jitter.
Keywords
Multimedia Server; Disk Scheduling; Pre-buffering; Jitter;
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