Resource consumption-aware QoS in cluster-based VOD servers

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.sysarc.2006.07.003 Byline: Dongmahn Seo, Joahyoung Lee, Yoon Kim, Chang Yeol Choi, Manbae Kim, Inbum Jung Keywords: VOD; Cluster system; Streaming media; QoS; Resource aware; Parallel processing Abstract: For Video-On-Demand (VOD) systems, it is important to provide Quality of Service (QoS) to more clients under limited resources. In this paper, the performance scalability in cluster-based VOD servers is studied with several grouping configurations of cluster nodes. To find performance bottlenecks, the monitoring functions are employed and the maximum QoS streams are measured under the various requests including VCR functions. To support more user friendly interface, an embedded set-top model is suggested for the QoS of TV clients. From our detailed experiment results, a new admission control method is proposed that is based on available system resources and the actual amount of resource consumed for QoS streams. The proposed method provides not only more scalable QoS in cluster-based VOD servers but also the enhancement of resource utilization by guaranteeing the maximum number of QoS streams. Author Affiliation: Department of Computer Science and Engineering, Kangwon National University, 192-1 Hyoja 2-Dong, Chuncheon, Kangwon Do 200-701, Republic of Korea Article History: Received 13 August 2005; Revised 21 April 2006; Accepted 3 July 2006 Article Note: (footnote) [star] This research was supported by the MIC (Ministry of Information and Communication), Korea, under the ITRC (Information Technology Research Center) support program supervised by the IITA (Institute of Information Technology Assessment) (IITA-2005-(C1090-0502-0022)). This work was partially supported by the Kangwon Institute of Telecommunications and Basic Research Program of the Korea Science Engineering Foundation (R05-2003-000-12146-0).