NDLI: Dynamic byzantine quorum systems

Content Provider	IEEE Xplore Digital Library
Author	Alvisi, L. Malkhi, D. Pierce, E. Reiter, M.K. Wright, R.N.
Copyright Year	2000
Description	Author affiliation: Dept. of Comput. Sci., Texas Univ., Austin, TX, USA (Alvisi, L.)
Abstract	Byzantine quorum systems enhance the availability and efficiency of fault-tolerant replicated services when servers may suffer Byzantine failures. An important limitation of Byzantine quorum systems is their dependence on a static threshold limit on the number of server faults. The correctness of the system is only guaranteed if the actual number of faults is lower than the the threshold at all times. However, a threshold chosen for the worst case wastes expensive replication in the common situation where the number of faults averages well below the worst case. In this paper, we present protocols for dynamically raising and lowering the resilience threshold of a quorum-based Byzantine fault-tolerant data service in response to current information on the number of server failures. Using such protocols, a system can operate in an efficient low-threshold mode with relatively small quorums in the absence of faults, increasing and decreasing the quorum size (and thus the tolerance) as faults appear and are dealt with, respectively.
Starting Page	283
Ending Page	292
File Size	318071
Page Count	10
File Format	PDF
ISBN	0769507077
DOI	10.1109/ICDSN.2000.857551
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Availability File servers Protocols Computer science Engineering profession Contracts Ash Power system modeling Data security Costs
Content Type	Text
Resource Type	Article

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