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arXiv · 2009.02235

FnF-BFT: Exploring Performance Limits of BFT Protocols

Zeta Avarikioti·Lioba Heimbach·Roland Schmid·Laurent Vanbever·Roger Wattenhofer·Patrick Wintermeyer
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Abstract

We introduce FnF-BFT, a parallel-leader byzantine fault-tolerant state-machine replication protocol for the partially synchronous model with theoretical performance bounds during synchrony. By allowing all replicas to act as leaders and propose requests independently, FnF-BFT parallelizes the execution of requests. Leader parallelization distributes the load over the entire network -- increasing throughput by overcoming the single-leader bottleneck. We further use historical data to ensure that well-performing replicas are in command. FnF-BFT's communication complexity is linear in the number of replicas during synchrony and thus competitive with state-of-the-art protocols. Finally, with FnF-BFT, we introduce a BFT protocol with performance guarantees in stable network conditions under truly byzantine attacks. A prototype implementation of \prot outperforms (state-of-the-art) HotStuff's throughput, especially as replicas increase, showcasing \prot's significantly improved scaling capabilities.

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Zeta Avarikioti, Lioba Heimbach, Roland Schmid, Laurent Vanbever, Roger Wattenhofer, Patrick Wintermeyer. 2021-03-10. FnF-BFT: Exploring Performance Limits of BFT Protocols. https://arxiv.org/abs/2009.02235

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