Participating Sets, Simulations, and the Consensus Hierarchy (Keynote Abstract)

Author Faith Ellen

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Faith Ellen

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Faith Ellen. Participating Sets, Simulations, and the Consensus Hierarchy (Keynote Abstract). In 20th International Conference on Principles of Distributed Systems (OPODIS 2016). Leibniz International Proceedings in Informatics (LIPIcs), Volume 70, p. 4:1, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)


The participating set problem can be solved in an asynchronous system using only registers. I will gently explain this problem and its solution, followed by a new extension, called consistent ordered partition. Next, I will present a wait-free simulation by f + 1 processes of any setconsensus algorithm that tolerates f faults. I will also describe how to extend this simulation using consistent ordered partition. Finally, I will discuss how this extension can be used to prove that, within every level m > 1 of the consensus hierarchy, there is an infinite sequence of increasingly more powerful deterministic objects.
  • Consensus
  • shared-memory systems


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