Method for Performance Analysis of Web Caching Hierarchical Structures

The use of the web-caching technique has been widely spread out with the objective of reducing the impact of some problems caused by the vertiginous growth of the Internet. The main characteristic of this technique is to keep the objects of the Internet next to the user and consequently, reducing the reply latency and the traffic in the communication channels. An important property of the web-caching servers is the cooperation ́s capacity that results in increasing the performance in comparison to isolated servers. However, in most cases, the amount of alternatives to establish this cooperation is large and the choice of the best option may be complex and arduous. Our work propose a method for the analysis of performance of hierarchical structures of web-caching servers based on an empirical model, due to difficulty, in some cases, to perform such analysis with analytical models or through measurements in real environments. We also present a validation of the proposed method, applied to a real case study. Key-Words: web caching, web caching hierarchical structures, web, caching. performance analysis.