Consensus in Synchronous Systems: A Concise Guided Tour

  • Authors:
  • Michel Raynal

  • Affiliations:
  • -

  • Venue:
  • PRDC '02 Proceedings of the 2002 Pacific Rim International Symposium on Dependable Computing
  • Year:
  • 2002

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Abstract

This paper is on consensus protocols for synchronoussystems where processes can commit crash failures, omission failures or Byzantine failures. Is presents and revisitsconsensus protocols coping with such failures in an increasing order of difficulty.The paper can be seen as a short tutorial whose aim is to make the reader familiar with synchrony assumptions, different definitions of the consensusproblem, and a hierarchy of process failure models. An important concern of the paper lies in simplicity. In additionto the survey flavor of the paper, several results that arepresented are new, among which the ones concerning theomission failure model.