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Consistency without concurrency control in large, dynamic systems

Abstract : Replicas of a commutative replicated data type (CRDT) eventually converge without any complex concurrency control. We validate the design of a non-trivial CRDT, a replicated sequence, with performance measurements in the context of Wikipedia. Furthermore, we discuss how to eliminate a remaining scalability bottleneck: Whereas garbage collection previously required a system-wide consensus, here we propose a flexible two-tier architecture and a protocol for migrating between tiers. We also discuss how the CRDT concept can be generalised, and its limitations.
Keywords : alg rep
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Submitted on : Thursday, December 24, 2015 - 1:08:42 PM
Last modification on : Friday, January 21, 2022 - 3:21:49 AM
Long-term archiving on: : Friday, March 25, 2016 - 11:51:33 AM


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Mihai Letia, Nuno Preguiça, Marc Shapiro. Consistency without concurrency control in large, dynamic systems. LADIS 2009 - 3rd ACM SIGOPS International Workshop on Large Scale Distributed Systems and Middleware, Oct 2009, Big Sky, MT, United States. pp.29--34, ⟨10.1145/1773912.1773921⟩. ⟨hal-01248270⟩



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