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Solving Agreement Problems with Weak Ordering Oracles

By Fernando Pedone, André Schiper, Peter Urban and David Cavin


Agreement problems, such as consensus, atomic broadcast, and group membership, are central to the implementation of fault-tolerant distributed systems. Despite the diversity of algorithms that have been proposed for solving agreement problems in the past years, almost all solutions are crash detection based (CDB ). We say that an algorithm is CDB if it uses some information about the status crashed/not crashed of processes. Randomized consensus algorithms are rare exceptions non-CDB algorithms. In this paper, we revisit the issue of non-CDB algorithms. Instead of randomization, we consider ordering oracles

Year: 2002
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