1 July 2002 Dynamic reconfiguration of continuous media server with changing access frequency
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Proceedings Volume 4862, Internet Multimedia Management Systems III; (2002) https://doi.org/10.1117/12.473044
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States
Due to skewed popularity of objects in many continuous media applications, data placement techniques such as selective replication have been introduced to resolve potential load imbalance problem by providing more replicas for more popular objects, resulting in a higher availability of hot objects and a more efficient usage of bounded storage space. To fully harness the advantage of selective replication technique, one may need to periodically reconfigure the number of instances of objects and data placement of them to tune up the system performance because, in reality, access frequency varies over time in many reasons. Reconfiguration usually requires time and disk bandwidth resulting in a degradation of the system performance during the process. This paper proposes algorithms for dynamic reconfiguration of continuous media servers based on ever changing popularity of objects. This paper quantifies the expected startup latency and reconfiguration overhead. Proposed analytic models and simulation results demonstrate that the proposed reconfiguration process is feasible in a reasonable amount of time. They also show tolerable performance degradation due to bandwidth overhead during reconfiguration process, which is critical for most real applications.
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Seon Ho Kim, Seon Ho Kim, Yong Lu, Yong Lu, } "Dynamic reconfiguration of continuous media server with changing access frequency", Proc. SPIE 4862, Internet Multimedia Management Systems III, (1 July 2002); doi: 10.1117/12.473044; https://doi.org/10.1117/12.473044

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