Approximate models for general cache networks

  • Authors:
  • Elisha J. Rosensweig;Jim Kurose;Don Towsley

  • Affiliations:
  • Department of Computer Science, University of Massachusetts, Amherst, Massachusetts;Department of Computer Science, University of Massachusetts, Amherst, Massachusetts;Department of Computer Science, University of Massachusetts, Amherst, Massachusetts

  • Venue:
  • INFOCOM'10 Proceedings of the 29th conference on Information communications
  • Year:
  • 2010

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Abstract

Many systems employ caches to improve performance. While isolated caches have been studied in-depth, multicache systems are not well understood, especially in networks with arbitrary topologies. In order to gain insight into and manage these systems, a low-complexity algorithm for approximating their behavior is required. We propose a new algorithm, termed a-NET, that approximates the behavior of multi-cache networks by leveraging existing approximation algorithms for isolated LRU caches. We demonstrate the utility of a-NET using both per-cache and network-wide performance measures.We also perform factor analysis of the approximation error to identify system parameters that determine the precision of a-NET.