A replication strategy for reducing wait time in video-on-demand systems

被引:1
|
作者
Chua, TS [1 ]
Goh, CH [1 ]
Ooi, BC [1 ]
Tan, KL [1 ]
机构
[1] Natl Univ Singapore, Sch Comp, Dept Comp Sci, Singapore 117543, Singapore
关键词
video-on-demand; continuous display; disk striping; phase-based striping method;
D O I
10.1023/A:1011363719345
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
User wait time-the amount of time a user spends in waiting for a video to commence-is an important service parameter in many video-on-demand (VOD) systems. In a companion paper (T.S. Chua, J. Li, B.C. Ooi, and K.L. Tan, in Proceedings of the ACM Multimedia '96, Boston, 1996, pp. 297-306), we have proposed a Phase-based Striping Method in which a video can be placed on multiple disks to take advantage of their combined bandwidth. In this paper, we extend the Phase-based Striping Method with a replication strategy aimed at reducing the average user wait time. To provide evidence for the effectiveness of the proposed strategy, we conducted extensive simulations of a video server under different loading and hardware configurations. Our results demonstrate that replication can lead to substantial reduction in average wait time.
引用
收藏
页码:39 / 58
页数:20
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