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Consensus in asynchronous systems where processes can crash and recover

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3 Author(s)
Hurfin, M. ; IRISA, Rennes, France ; Mostefaoui, A. ; Raynal, M.

The consensus problem is now well identified as being one of the most important problems encountered in the design and the construction of fault-tolerant distributed systems. This problem is defined as follows: processes have to reach a common decision, which depends on their inputs, despite failures. We consider the consensus problem in asynchronous distributed systems augmented with unreliable failure detectors. Several protocols have been proposed for these systems, when process crashes are assumed to be definitive. This paper addresses the consensus problem in a more practical asynchronous system model, namely in a context where processes can crash and recover. As a process crash entails the loss of its volatile memory, each process is equipped with a stable storage. So, to be efficient a consensus protocol has to log as few critical data as possible. The proposed protocol uses a new class of failure detectors suited to the crash/recovery model. It is particularly efficient when, whether there are crashes or not, the underlying failure detector makes few mistakes. Additionally, the proposed protocol tolerates message duplication and copes with some message losses

Published in:

Reliable Distributed Systems, 1998. Proceedings. Seventeenth IEEE Symposium on

Date of Conference:

20-23 Oct 1998

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