Squirrel: a decentralized peer-to-peer web cache

  • Authors:
  • Sitaram Iyer;Antony Rowstron;Peter Druschel

  • Affiliations:
  • Rice University, Houston, TX;Microsoft Research, Cambridge, UK;Rice University, Houston, TX

  • Venue:
  • Proceedings of the twenty-first annual symposium on Principles of distributed computing
  • Year:
  • 2002

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Abstract

This paper presents a decentralized, peer-to-peer web cache called Squirrel. The key idea is to enable web browsers on desktop machines to share their local caches, to form an efficient and scalable web cache, without the need for dedicated hardware and the associated administrative cost. We propose and evaluate decentralized web caching algorithms for Squirrel, and discover that it exhibits performance comparable to a centralized web cache in terms of hit ratio, bandwidth usage and latency. It also achieves the benefits of decentralization, such as being scalable, self-organizing and resilient to node failures, while imposing low overhead on the participating nodes.