A distributed mutual exclusion algorithm

  • Authors:
  • Ichiro Suzuki;Tadao Kasami

  • Affiliations:
  • Department of Electrical Engineering/Computer Science, Texas Tech University, Lubbock, TX;Department of Information and Computer Sciences, Faculty of Engineering Science, Osaka University, Toyonaka 560, Japan

  • Venue:
  • ACM Transactions on Computer Systems (TOCS)
  • Year:
  • 1985

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Abstract

A distributed algorithm is presented that realizes mutual exclusion among N nodes in a computer network. The algorithm requires at most N message exchanges for one mutual exclusion invocation. Accordingly, the delay to invoke mutual exclusion is smaller than in an algorithm of Ricart and Agrawala, which requires 2*(N - 1) message exchanges per invocation. A drawback of the algorithm is that the sequence numbers contained in the messages are unbounded. It is shown that this problem can be overcome by slightly increasing the number of message exchanges.