Fault-scalable Byzantine fault-tolerant services

A fault-scalable service can be configured to tolerate increasing numbers of faults without significant decreases in performance. The Query/Update (Q/U) protocol is a new tool that enables construction of fault-scalable Byzantine faulttolerant services. The optimistic quorum-based nature of the Q/U protocol allows it to provide better throughput and fault-scalability than replicated state machines using agreement-based protocols. A prototype service built using the Q/U protocol outperforms the same service built using a popular replicated state machine implementation at all system sizes in experiments that permit an optimistic execution. Moreover, the performance of the Q/U protocol decreases by only 36% as the number of Byzantine faults tolerated increases from one to five, whereas the performance of the replicated state machine decreases by 83%. Categories and Subject Descriptors C.2.4 [Computer-Communication Networks]: Distributed Systems; D.4.5 [Operating Systems]: Reliability�...

• Type: Conference
• Year: 2005
• Where: SOSP
• Authors: Michael Abd-El-Malek, Gregory R. Ganger, Garth R. Goodson, Michael K. Reiter, Jay J. Wylie
• Keywords: Faults Tolerated Increases, Operating System, Optimistic Quorum-based Nature, Popular Replicated State, SOSP 2005