理解协作式Web缓存系统的性能

Xiaosong Hu, A. N. Zincir-Heywood
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引用次数: 6

摘要

Web缓存被认为是缓解服务瓶颈和减少网络流量的有效方案,从而最大限度地减少用户在Internet上的访问延迟。为了实现缓存性能的最大化,采用了分层式、分布式和混合式等缓存协作系统。在这项工作中,我们首先推导了一个分析模型来计算上述三种缓存系统的性能参数。然后,我们在Web缓存模拟器上测试这些系统。结果表明,与分布式系统和分层系统相比,混合系统在命中率和带宽利用率方面具有很强的竞争力。另一方面,混合系统在延迟和跳数方面给出了最佳结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Understanding the performance of cooperative Web caching systems
Web caching has been recognized as an effective scheme to alleviate the service bottleneck and reduce the network traffic, thereby minimizing the user access latency on the Internet. To maximize the performance of caching, cache cooperation systems such as hierarchical, distributed and hybrid are employed. In this work, we first derive an analytical model to calculate the performance parameters for the aforementioned three caching systems. We then test these systems on a Web cache simulator. Results show that the hybrid system is very competitive in terms of the hit ratio and the bandwidth usage compared to the distributed system and hierarchical system, respectively. On the other hand, the hybrid system gives the optimal results in terms of latency and the number of hops.
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