03/08/2020

Brief announcement: On the significance of consecutive ballots in paxos

Eli Goldweber, Nuda Zhang, Manos Kapritsos

Keywords: state machine replication, weakening, paxos, consensus

Abstract: In this paper, we examine the Paxos protocol and demonstrate how the discrete numbering of ballots can be leveraged to weaken the conditions for learning. Specifically, we define the notion of consecutive ballots and use this to define Consecutive Quorums. Consecutive Quorums weaken the learning criterion such that a learner does not need matching accept messages sent in the same ballot from a majority of acceptors to learn a value. We prove that this modification preserves the original safety and liveness guarantees of Paxos. We define Consecutive Paxos which encapsulates the properties of discrete consecutive ballots. To establish the correctness of these results, in addition to a paper proof, we formally verify the correctness of a State Machine Replication Library built on top of an optimized version of Multi-Paxos modified to reflect Consecutive Paxos.

 0
 0
 0
 0
This is an embedded video. Talk and the respective paper are published at PODC 2020 virtual conference. If you are one of the authors of the paper and want to manage your upload, see the question "My papertalk has been externally embedded..." in the FAQ section.

Comments

Post Comment
no comments yet
code of conduct: tbd

Similar Papers