Performance Analysis of the Raft Consensus Algorithm for Private Blockchains

Consensus is one of the key problems in blockchains. There are many articles analyzing the performance of threat models for blockchains. But the network stability seems lack of attention, which in fact affects the blockchain performance. This paper studies the performance of a well adopted consensus...

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Veröffentlicht in:IEEE transactions on systems, man, and cybernetics. Systems Jg. 50; H. 1; S. 172 - 181
Hauptverfasser: Huang, Dongyan, Ma, Xiaoli, Zhang, Shengli
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.01.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Algorithms
Blockchain
Computer networks
Computer simulation
Consensus algorithm
Cryptography
Elections
Heart beat
Mathematical models
network split probability
Packet loss
private blockchain
Raft consensus algorithm
Transient analysis
Voting
ISSN:2168-2216, 2168-2232
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Zusammenfassung:Consensus is one of the key problems in blockchains. There are many articles analyzing the performance of threat models for blockchains. But the network stability seems lack of attention, which in fact affects the blockchain performance. This paper studies the performance of a well adopted consensus algorithm, Raft, in networks with non-negligible packet loss rate. In particular, we propose a simple but accurate analytical model to analyze the distributed network split probability. At a given time, we explicitly present the network split probability as a function of the network size, the packet loss rate, and the election timeout period. To validate our analysis, we implement a Raft simulator and the simulation results coincide with the analytical results. With the proposed model, one can predict the network split time and probability in theory and optimize the parameters in Raft consensus algorithm.
Bibliographie:ObjectType-Article-1
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ISSN:2168-2216
2168-2232
DOI:10.1109/TSMC.2019.2895471