Abstract
In the Raft consensus algorithm, some nodes cannot communicate with other nodes due to network malfunction, which will greatly increase the consensus time. Moreover, the leader node in the Raft algorithm has strong leadership. Once something goes wrong with the leader, the consensus time of the entire distributed system will be greatly increased. LTRaft (Raft with Leadership Transfer) consensus algorithm with a state monitoring mechanism and alternative leaders is proposed. In the LTRaft algorithm, outdated node is introduced. Outdated nodes can not participate in the leader election, because they have just resumed communication and do not update logs in time. If they participate in the leader election, the consensus efficiency of the system will be seriously affected. Therefore, outdated nodes are prevented from participating in the leader election. In addition, when the leader node fails, the alternative leader node will take over its leadership and start a new consensus process until the next leader is elected. The experimental results show that LTRaft has significantly improved consensus efficiency and the fault tolerance of the system when the leader node fails and outdated nodes appear.
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Acknowledgments
This work has been supported by the NSFC under Grant No.61961029, Key Research and Development Plan in Jiangxi Province Department of Science and Technology under Grant No.20171ACE50025.
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Tan, P., Zou, W., Tang, W. (2021). A Consensus Algorithm with Leadership Transfer-LTRaft. In: Cui, L., Xie, X. (eds) Wireless Sensor Networks. CWSN 2021. Communications in Computer and Information Science, vol 1509. Springer, Singapore. https://doi.org/10.1007/978-981-16-8174-5_18
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DOI: https://doi.org/10.1007/978-981-16-8174-5_18
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