Fisheye consistency: Keeping data in synch in a georeplicated world

Roy Friedman, Michel Raynal, Francois Taïani

פרסום מחקרי: פרק בספר / בדוח / בכנספרסום בספר כנסביקורת עמיתים

תקציר

Over the last thirty years, numerous consistency conditions for replicated data have been proposed and implemented. Popular examples include linearizability (or atomicity), sequential consistency, causal consistency, and eventual consistency. These conditions are usually defined independently from the computing entities (nodes) that manipulate the replicated data; i.e., they do not take into account how computing entities might be linked to one another, or geographically distributed. To address this lack, as a first contribution, this paper introduces the notion of proximity graph between computing nodes. If two nodes are connected in this graph, their operations must satisfy a strong consistency condition, while the operations invoked by other nodes are allowed to satisfy a weaker condition. The second contribution exploits this graph to provide a generic approach to the hybridization of data consistency conditions within the same system. We illustrate this approach on sequential consistency and causal consistency, and present a model in which all data operations are causally consistent, while operations by neighboring processes in the proximity graph are sequentially consistent. The third contribution of the paper is the design and the proof of a distributed algorithm based on this proximity graph, which combines sequential consistency and causal consistency (the resulting condition is called fisheye consistency). In doing so the paper provides a generic provably correct solution of direct relevance to modern georeplicated systems.

שפה מקוריתאנגלית
כותר פרסום המארחNetworked Systems - 3rd International Conference, NETYS 2015, Revised Selected Papers
עורכיםAhmed Bouajjani, Hugues Fauconnier
עמודים246-262
מספר עמודים17
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 2015
אירוע3rd International Conference on Networked Systems, NETYS 2015 - Agadir, מרוקו
משך הזמן: 13 מאי 201515 מאי 2015

סדרות פרסומים

שםLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
כרך9466

כנס

כנס3rd International Conference on Networked Systems, NETYS 2015
מדינה/אזורמרוקו
עירAgadir
תקופה13/05/1515/05/15

ASJC Scopus subject areas

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