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Cooperative caching middleware for cluster-based servers

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2 Author(s)
Cuenca-Acuna, F.M. ; Dept. of Comput. Sci., Rutgers Univ., Piscataway, NJ, USA ; Nguyen, T.D.

Considers the use of cooperative caching to manage the memories of cluster-based servers. Over the last several years, a number of researchers have proposed content-aware servers that implement locality-conscious request distribution to address this memory management problem. During this development, it has become conventional wisdom that cooperative caching cannot match the performance of these servers. Unfortunately, while content-aware servers provide very high performance, their request distribution algorithms are typically bound to specific applications. The advantage of building distributed servers on top of a block-based cooperative caching layer is the generality of such a layer; it can be used as a building block for diverse services, ranging from file systems to web servers. In this paper, we reexamine the question of whether a server built on top of a generic block-based cooperative caching algorithm can perform competitively with content-aware servers. Specifically, we compare the performance of a cooperative caching-based Web server against L2S, a highly optimized locality- and load-conscious server. Our results show that, by modifying the replacement policy of traditional cooperative caching algorithms, we can achieve much of the performance provided by locality-conscious servers. Our modification increases network communication to reduce disk accesses, a reasonable trade-off considering the current trend of relative performance between LANs and disks

Published in:

High Performance Distributed Computing, 2001. Proceedings. 10th IEEE International Symposium on

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