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bin/daemon.sh problem with memory args - MapReduce - [mail # user]
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...Somehow, in the long chain of shell variable fiddling that creates the command line in bin/daemon.sh, there is a small mistake. The command line for tasktracker comes out (shorn of many othe...
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Author: Lance Norskog,
2011-04-08, 04:37
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Re: Dataset comparison and ranking - views - MapReduce - [mail # user]
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...The Mahout project has several tools for this class of problem. http://mahout.apache.org On Tue, Mar 8, 2011 at 9:07 AM, Chase Bradford w rote: at nchor region way ar...
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Author: Lance Norskog,
2011-03-10, 06:38
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Re: how to write custom object using M/R - MapReduce - [mail # user]
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...Does you custom object have Writable implemented? Also, does it have toString() implemented? I think this means the Writable code does not work: K CustomObject@2b237512 K C...
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Author: Lance Norskog,
2011-01-17, 09:51
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Re: How can I compile and use my own hadoop? - MapReduce - [mail # user]
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...I write simple driver classes and run them from Eclipse. It takes some fiddling, so if you're not comfortable with that, running it from ant is your best bet. On Mon, Nov 8, 2010 at 9:...
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Author: Lance Norskog,
2010-11-09, 07:42
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Re: Predicting how many values will I see in a call to reduce? - MapReduce - [mail # user]
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...It is key to the scheduling paradigm of Hadoop that it doesn't have to tell you how many or when. It would have to store up all of the data for your key before activating your reducer. This ...
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Author: Lance Norskog,
2010-11-09, 07:40
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Re: Is continuous map reduce supported - MapReduce - [mail # user]
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...Dead link: http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapred/lib/ChainReducer.html On Wed, Sep 1, 2010 at 9:56 AM, Owen O'Malley wrote: ...
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Author: Lance Norskog,
2010-09-02, 03:33
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