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Dynamo: amazon's highly available key-value store

by: Giuseppe Decandia, Deniz Hastorun, Madan Jampani, Gunavardhan Kakulapati, Avinash Lakshman, Alex Pilchin, Swaminathan Sivasubramanian, Peter Vosshall, Werner Vogels
In SOSP '07: Proceedings of twenty-first ACM SIGOPS symposium on Operating systems principles (2007), pp. 205-220.

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This article has been bookmarked 26 times, initially on 2007-11-03.

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2008-01-03 User rstata , 1 note

Nice reminder that we don't always have to put all the work of maintaining consistency on the writer.

I really liked the idea of "W+R>N," i.e., the number of copies that a writer waits to see plus the number of copies that a reader waits to see must be greater than the total number of replicas to be stored. Parameterizing over W and R gives system-designers a nice knob to trade-off the latency and availability seen by writers versus readers. I don't think I've seen this parameterization before.

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