Distributed Agreement with Optimal Communication Complexity

We consider the problem of fault-tolerant agreement in a crash-prone synchronous system. We present a new randomized consensus algorithm that achieves optimal communication efficiency, using only O(n) bits of communication, and terminates in (almost optimal) time O(logn), with high probability. The same protocol, with minor modifications, can also be used in partially synchronous networks, guaranteeing correct behavior even in asynchronous executions, while maintaining efficient performance in synchronous executions. Finally, the same techniques also yield a randomized, fault-tolerant gossip protocol that terminates in O(log*n) rounds using O(n) messages (with bit complexity that depends on the data being gossiped).


Published in:
Proceedings Of The Twenty-First Annual Acm-Siam Symposium On Discrete Algorithms, 135, 965-977
Presented at:
21st Annual ACM/SIAM Symposium on Discrete Algorithms, Austin, TX, Jan 17-19, 2010
Year:
2010
Publisher:
Siam, 3600 Univ City Science Center, Philadelphia, Pa 19104-2688 Usa
ISBN:
978-0-898717-01-3
Keywords:
Laboratories:




 Record created 2011-12-16, last modified 2018-09-13


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