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Uniform dynamic self-stabilizing leader election

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3 Author(s)
Dolev, S. ; Dept. of Math. & Comput. Sci., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel ; Israeli, Amos ; Moran, S.

A distributed system is self-stabilizing if it can be started in any possible global state. Once started the system regains its consistency by itself, without any kind of outside intervention. The self-stabilization property makes the system tolerant to faults in which processors exhibit a faulty behavior for a while and then recover spontaneously in an arbitrary state. When the intermediate period in between one recovery and the next faulty period is long enough, the system stabilizes. A distributed system is uniform if all processors with the same number of neighbors are identical. A distributed system is dynamic if it can tolerate addition or deletion of processors and links without reinitialization. In this work, we study uniform dynamic self-stabilizing protocols for leader election under readwrite atomicity. Our protocols use randomization to break symmetry. The leader election protocol stabilizes in O(ΔD log n) time when the number of the processors is unknown and O(ΔD), otherwise. Here Δ denotes the maximal degree of a node, D denotes the diameter of the graph and n denotes the number of processors in the graph. We introduce self-stabilizing protocols for synchronization that are used as building blocks by the leader-election algorithm. We conclude this work by presenting a simple, uniform, self-stabilizing ranking protocol

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Parallel and Distributed Systems, IEEE Transactions on  (Volume:8 ,  Issue: 4 )