``Building a large and efficient hybrid peer-to-peer Internet caching
system"

Li Xiao, Xiaodong Zhang, Artur Andrzejak, and Songqing Chen

IEEE Transactions on Knowledge and Data Engineering, Vol. 16, No. 6,
2004, pp. 754-769.

Abstract

Proxy hit ratios trend to decrease as the demand and supply of Web
contents are becoming more diverse.  By case studies, we quantitatively
confirm this trend, and observe significant document duplications among
a proxy and its client browsers' caches.  One reason behind this trend
is that the client/server Web caching model does not support direct
resource sharing among clients, causing the Web contents and the network
bandwidths among clients being relatively under-utilized.  To address
these limits and improve Web caching performance, we have extensively
enhanced and deployed our browsers-aware framework, a peer-to-peer Web
caching management scheme.  We make the browsers and their proxy share
the contents to exploit the neglected but rich data locality in browsers,
and reduces document duplications among the proxy and browsers' caches to
effectively utilize the Web contents and network bandwidth among clients.
The objective of our scheme is to improve the scalability of proxy-based
caching both in the number of connected clients and in the diversity
of Web documents.  In this paper, we show that building such a caching
system with considerations of sharing contents among clients, minimizing
document duplications, and achieving data integrity and communication
anonymity, is not only feasible but also highly effective.

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