The Consensus MICHAEL Department Problem in Fault-Tolerant MALEK Unmerslty Computing BARBORAK of Electrical and AND MIROSLAW Computer Engineering, of Texas, Austin. TX 78712 ANTON Motorola, DAHBURA Inc., Cambridge Research Center, One Kendall Square, Bldg 200, Cambridge, MA 02139 The consensus problem is concerned with by the the agreement segment on a system of that paper status by the or even The systems on fault-free malicious resulting and will the directions segment spread protocols impact of a processor of disinformation are useful population in spite faulty fault-tolerant of the possible parallel inadvertent population. surveys and throughout and distributed the design problem, work. of decision compares systems to come. This outlines research suggests consensus approaches, applications, for future Categories and Subject Descriptors: C.2.3 [Computer-Communication Networks]: network monitoring; C.2.4 [ComputerNetwork Operations network management; applications; network Communication Networks]: Distributed Systems distributed operating systems; D.4.5 [Operating Systems]: Reliability fazdt tolerance General Additional theory, Terms: Algorithms, Design, Reliability Byzantine diagnosis agreement, consensus problem, decision Key Words processor and Phrases: membership, system 1. INTRODUCTION It has long been the goal of system designers to connect independent computer resources together to create a network with greater power and availability than any of its parts. Unfortunately, the
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