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Proceedings Paper

Performance analysis of request migration in video-on-demand systems
Author(s): Yinqing Zhao; Xiaoming Sun; Zhi Shi; C.-C. Jay Kuo
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Paper Abstract

The random early migration (REM) scheme was proposed in our previous work to balance the load of multiple media servers to decrease the average service delay. When an user request arrives, it is randomly directed to a media server that has the designated video content cached on. When the load of this server exceeds a preset threshold, REM is executed by choosing one of its in-service requests and migrating it to another media server with a certain probability, where the exact probability is a function of the service load. We introduce a state matrix representation that stores the service load information of each media server and plays an important role in the determination of migration paths. All possible state matrices can be mapped to a vector space called the state matrix space (SMS). With SMS, we can analyze the performance of VoD systems such as the failure rate and service delay, and these derived results are verified by numerical experiments. It is demonstrated that REM outperforms the normal migration scheme with shorter service delay and lower failure rates.

Paper Details

Date Published: 10 December 2002
PDF: 12 pages
Proc. SPIE 4861, Multimedia Systems and Applications V, (10 December 2002); doi: 10.1117/12.456338
Show Author Affiliations
Yinqing Zhao, Univ. of Southern California (United States)
Xiaoming Sun, Univ. of Southern California (United States)
Zhi Shi, Univ. of Southern California (United States)
C.-C. Jay Kuo, Univ. of Southern California (United States)


Published in SPIE Proceedings Vol. 4861:
Multimedia Systems and Applications V
Andrew G. Tescher; Bhaskaran Vasudev; V. Michael Bove; Ajay Divakaran, Editor(s)

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