Bandle: Asynchronous State Machine Replication Made Efficient

This is the authors' abstract. We don't add key points for this paper.

State machine replication (SMR) uses consensus as its core component for reaching agreement among a group of processes, in order to provide fault-tolerant services. Most SMR protocols, such as Paxos and Raft, are designed in the partial synchrony model. Partially synchronous protocols rely on timing assumptions to elect a special role (such as the leader), which may become the performance bottleneck under a heavy workload. From an engineering perspective, partially synchronous protocols have to wait for a pre-defined period of time and implement a (complicated) failover mechanism in order to replace the faulty leader. In contrast, asynchronous protocols are immune to such problems.