Performance evaluation of the random replacement policy for networks of caches

  • Authors:
  • Massimo Gallo;Bruno Kauffmann;Luca Muscariello;Alain Simonian;Christian Tanguy

  • Affiliations:
  • France Telecom, Iss-les-Moulineaux, France;France Telecom, Issy-les-Moulineaux, France;France Telecom, Issy-les-Moulineaux, France;France Telecom, Issy-les-Moulineaux, France;France Telecom, Issy-les-Moulineaux, France

  • Venue:
  • Proceedings of the 12th ACM SIGMETRICS/PERFORMANCE joint international conference on Measurement and Modeling of Computer Systems
  • Year:
  • 2012

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Abstract

Caching is a key component for Content Distribution Networks and new Information-Centric Network architectures. In this paper, we address performance issues of caching networks running the RND replacement policy. We first prove that when the popularity distribution follows a general power-law with decay exponent α 1, the miss probability is asymptotic to O( C1-α) for large cache size C. We further evaluate network of caches under RND policy for homogeneous tree networks and extend the analysis to tandem cache networks where caches employ either LRU or RND policies.