User talk:Chire

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Original Barnstar.png Barnstar of Chire = Awesome
I hereby award you a barnstar Chire for your efforts in converting the article "Cluster Analysis" from an unreadable jumble of jargon and mathematical formulas to one of the most useful Wikipedia articles I've ever had the pleasure of reading. Gracias. Scottmas


MapReduce[edit]

Hello, I noticed your edit at MapReduce and request you provide some sort of cite as to my reading, at least the first sentence about single-threaded makes no sense to me. Thanks. WilliamKF (talk) 21:56, 3 October 2014 (UTC)

@WilliamKF: the "single-threaded" was not a typo. There are some really slow "map-reduce" implementations out there that use only a single thread, and offer none of the parallelism and fault tolerance benefits discussed in the original map reduce paper. There are plenty of complaints on the performance of MongoDB, for example:
https://stackoverflow.com/questions/3947889/mongodb-terrible-mapreduce-performance
Things apparently have improved slightly since they moved to multithreaded "map reduce" with the V8 JavaScript engine.
The point of that sentence is that just allowing "map" and "reduce" functions doesn't make up a proper MapReduce system. --Chire (talk) 12:51, 4 October 2014 (UTC)
Thanks, I've updated the article to try and make the meaning clearer and added a cite, please review. WilliamKF (talk) 17:37, 4 October 2014 (UTC)
@WilliamKF: Thanks. The only thing is that I don't think such a web site is a reliable source. :-( I'd prefer to have something that discusses how to design a performant MapReduce implementation. But I havn't found any such source yet. --Chire (talk) 17:00, 5 October 2014 (UTC)
I believe any cite is better than no cite, plus I feel stackoverflow is pretty reliable due to the voting etc. WilliamKF (talk) 05:33, 6 October 2014 (UTC)