Developing a Consensus Algorithm using Stepwise Refinement

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Author(s)Bryans JW
Publication type Report
Series TitleSchool of Computing Science Technical Report Series
Year2010
Legacy DateDecember 2010
Report Number1228
Pages22
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We give a formal development and proof of a known consensus algorithm using stepwise refinement. We begin with an abstract specification of the intended result of the algorithm. The algorithm is developed and proved correct over a number of refinement steps. The proof of correctness is performed concurrently with the development. The development and proof make use of key fault and failure assumptions. The stepwise refinement approach allows us to introduce and prove each property at the most appropriate stage in the development, before detail irrelevant to that property has been added to the model. Finally we introduce an abstract model of a possible network on which the algorithm could be executed.
InstitutionSchool of Computing Science, University of Newcastle upon Tyne
Place PublishedNewcastle upon Tyne
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