Title:
Distributed Consensus Revisited
Distributed Consensus Revisited
Authors
Neiger, Gil
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Abstract
Distributed Consensus is a classical problem in distributed computing.
It requires the correct processors in a distributed system to agree on
a common value despite the failure of other processors. This problem
is closely related to other problems, such as Byzantine Generals,
Approximate Agreement, and k-Set Agreement. This paper examines a
variant of Distributed Consensus that considers agreement on a value
that is more than a single bit and requires that the agreed upon value
be one of the correct processors' input values. It shows that, for
this problem to be solved in a system with arbitrary failures, it is
necessary that more processors remain correct than for solutions to
Distributed Consensus and for cases where agreement is only a single
bit. Specifically, the number of processors that must be correct is a
function of the size of the domain of values used. Two existing
consensus algorithms are modified to solve this stronger variant.
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Date Issued
1993
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171909 bytes
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Text
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Technical Report