Abstract

The consensus problem is an important topic in modern networked systems. The goal of the consensus protocol is to make each non-faulty processor agree on a common value without influence from faulty processors. However, if the initialvalue proposed by the processor is shared by only a small number of other processors, this initial-value will not become the consensus value. In order to increase the chances that all processors agree on a consensus value they prefer and accept, we design a new consensus protocol that allows change of the initialvalue within certain limitations during message exchange. This way, even if the final consensus value is not a value they have originally expected, it is still a value they prefer and accept.

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