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Consensus (computer science)

A fundamental problem in distributed computing and multi-agent systems is to achieve overall system reliability in the presence of a number of faulty processes. This often requires coordinating processes to reach consensus, or agree on some data value that is needed during computation. Example applications of consensus include agreeing on what…

Products, Models of computation & Some consensus protocols

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Overview

Problem description

Models of computation

Equivalency of agreement problems

Solvability results for some agreement problems

Some consensus protocols

Consensus number

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Map overview Semantic statistics

Consensus (computer science)

Nodes61
Edges60
Triples27
Avg. degree1.97
Density0.032787
Components1

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Important terminology Word statistics

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Important terminology

consensus processes process value may byzantine protocols problem protocol failures must number one algorithm message system synchronous proof models systems

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Paxosinstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
cooperating nodes agree on a single value such as an integerinstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
which may be of variable size so as to encode useful metadata such as a transaction committed to a database.A special case of the single-value consensus probleminstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
called binary consensusinstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
restricts the inputinstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
and hence the output domaininstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
to a single binary digitinstance ofbut the communication history of the message.Inputs and outputs of consensusIn the most traditional single-value consensus protocols0.80text
Multi-Paxosinstance ofespecially for asynchronous consensus.In multi-valued consensus protocols0.80text
Raftinstance ofespecially for asynchronous consensus.In multi-valued consensus protocols0.80text
the goal is to agree on not just a single value but a series of values over timeinstance ofespecially for asynchronous consensus.In multi-valued consensus protocols0.80text
forming a progressively-growing historyinstance ofespecially for asynchronous consensus.In multi-valued consensus protocols0.80text
reconfiguration support can make multi-valued consensus protocols more efficient in practice.Crashinstance ofmany optimizations and other considerations0.80text

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