PnyxDB: a Lightweight Leaderless Democratic Byzantine Fault Tolerant Replicated Datastore

Abstract : Byzantine-Fault-Tolerant (BFT) systems are rapidly emerging as a viable technology for production-grade systems, notably in closed consortia deployments for nancial and supply-chain applications. Unfortunately, most algorithms proposed so far to coordinate these systems suffer from substantial scalability issues, and lack important features to implement Internet-scale governance mechanisms. In this paper, we observe that many application workloads offer little concurrency, and propose PnyxDB, an eventually-consistent Byzantine Fault Tolerant replicated datastore that exhibits both high scalability and low latency. Our approach is based on conditional endorsements, that allow nodes to specify the set of transactions that must not be committed for the endorsement to be valid. In addition to its high scalability, PnyxDB supports application-level voting, i.e. individual nodes are able to endorse or reject a transaction according to application-defined policies without compromising consistency. We provide a comparison against BFTSMaRt and Tendermint, two competitors with different design aims, and show that our implementation speeds up commit latencies by a factor of 11, remaining below 5 seconds in a worldwide geodistributed deployment of 180 nodes.
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-02355778
Contributor : Loïck Bonniot <>
Submitted on : Friday, November 8, 2019 - 3:23:43 PM
Last modification on : Sunday, November 10, 2019 - 1:16:49 AM

Files

pnyxdb.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-02355778, version 1
  • ARXIV : 1911.03291

Citation

Loïck Bonniot, Christoph Neumann, François Taïani. PnyxDB: a Lightweight Leaderless Democratic Byzantine Fault Tolerant Replicated Datastore. 2019. ⟨hal-02355778⟩

Share

Metrics

Record views

38

Files downloads

54