Easy Consensus Algorithms for the Crash-Recovery Model

Freiling, Felix ; Lambertz, Christian ; Majster-Cederbaum, Mila

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URL: https://ub-madoc.bib.uni-mannheim.de/1928
URN: urn:nbn:de:bsz:180-madoc-19285
Document Type: Working paper
Year of publication: 2008
The title of a journal, publication series: None
Publication language: English
Institution: School of Business Informatics and Mathematics > Sonstige - Fakultät für Wirtschaftsinformatik und Wirtschaftsmathematik
MADOC publication series: Veröffentlichungen der Fakultät für Mathematik und Informatik > Institut für Informatik > Technical Reports
Subject: 004 Computer science, internet
Subject headings (SWD): Systemzusammenbruch , Systemtechnik , Algorithmische Programmierung
Keywords (English): consensus , crash-recovery
Abstract: In the crash-recovery failure model of asynchronous distributed systems, processes can temporarily stop to execute steps and later restart their computation from a predefined local state. The crash-recovery model is much more realistic than the crash-stop failure model in which processes merely are allowed to stop executing steps. The additional complexity is reflected in the multitude of assumptions and the technical complexity of algorithms which have been developed for that model. We focus on the problem of consensus in the crash-recovery model, but instead of developing completely new algorithms from scratch, our approach aims at reusing existing crash-stop consensus algorithms in a modular way using the abstraction of failure detectors. As a result, we present three new and relatively simple consensus algorithms for the crash-recovery model for different types of assumptions.
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