Efficient and Tailored Resource Management for the P2P Web Caching(Network System,<Special Section>Parallel/Distributed Processing and Systems)
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概要
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While web proxy caching is a widely deployed technique, the performance of a proxy cache is limited by the local storage. Some studies have addressed this limitation by using the residual resources of clients via a p2p method and have achieved a very high hit rate. However, these approaches treat web objects as homogeneous objects and there is no consideration of various web characteristics. Consequently, the byte hit rate of the system is limited, external bandwidth is wasted, and perceived user latency is increased. The present paper suggests an efficient p2p based web caching technique that manages objects with different policies so as to exploit the characteristics of web objects, such as size and temporal locality. Small objects are stored alone whereas large objects are stored by dividing them into numerous small blocks, which are distributed in clients. On a proxy cache, header blocks of large objects take the place of objects themselves and smaller objects are cached. This technique increases the hit rate. Unlike a web cache, which evicts large objects as soon as possible in the case where clients fulfill the role of backup storage, large objects are given higher priority than small objects in the proposed approach. This maximizes the effect of hits for large objects and thereby increases the byte hit rate. Furthermore, we construct simple latency models for various p2p based web caching systems and analyze the effects of the proposed policies on these systems. We then examine the performances of the efficient policies via a trace driven simulation. The results demonstrate that the proposed techniques effectively enhance web cache performance, including hit rate, byte hit rate, and response time.
- 一般社団法人電子情報通信学会の論文
- 2007-01-01
著者
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Park Daeyeon
Department Of Electrical Engineering And Computer Science Korea Advanced Institute Of Science And Te
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Park Daeyeon
Department Of Electrical Engineering And Computer Science Korea Advanced Institute Of Science And Te
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Kim Kyungbaek
Univ. California Irvine Usa
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Kim Kyungbaek
Department Of Computer Science University Of California
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