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Re: Multi-stage map/reduce jobs - MapReduce - [mail # user]
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...Hadoop is not an API for orchestrating mapreduce jobs- fortunately, there is no need for such an API. Each mapreduce job can simple be run like a normal java class. So, to run mu...
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Author: Jay Vyas,
2012-11-23, 22:50
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Re: Optimizing Disk I/O - does HDFS do anything ? - MapReduce - [mail # user]
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...hmmm... 1) but I thought that this sort of thing (yes even on linux) becomes important when you have large amounts of data - because the way files are written can cause issues on highl...
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Author: Jay Vyas,
2012-11-13, 21:40
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Optimizing Disk I/O - does HDFS do anything ? - MapReduce - [mail # user]
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...How does HDFS deal with optimization of file streaming? Do data nodes have any optimizations at the disk level for dealing with fragmented files? I assume not, but just curious i...
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Author: Jay Vyas,
2012-11-13, 20:30
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Re: mapred.tasktracker.map.tasks.maximum - MapReduce - [mail # user]
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...Hmmm What do you mean wrong configuration file.? How could that ever happen? Jay Vyas On Nov 13, 2012, at 10:25 AM, Mark Kerzner wrote: ...
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Author: Jay Vyas,
2012-11-13, 15:27
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Re: Can dynamic Classes be accessible to Mappers/Reducers? - MapReduce - [mail # user]
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...Wow that's an awesome trick.! Okay thanks. Jay Vyas MMSB UCHC On Nov 13, 2012, at 3:56 AM, Bertrand Dechoux wrote: ...
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Author: Jay Vyas,
2012-11-13, 11:50
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Can dynamic Classes be accessible to Mappers/Reducers? - MapReduce - [mail # user]
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...Hi guys: Im trying to dynamically create a java class at runtime and submit it as a hadoop job. How does the Mapper (or for that matter, Reducer) use the data in the Job object? ...
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Author: Jay Vyas,
2012-11-12, 23:58
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Re: mr unit pom file - MapReduce - [mail # user]
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...Yup, your right the mrunit pom file is specified here: https://cwiki.apache.org/confluence/display/MRUNIT/Index%3bjsessionid=C4B0ADDF6B88BBEFCF60136A62441A12 too bad that it need...
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Author: Jay Vyas,
2012-11-09, 20:42
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mr unit pom file - MapReduce - [mail # user]
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...Hi guys: Im having trouble getting MRUnit from maven. Is this the correct pom? org.apache.mrunit mrunit 0.9.0-incubating Jay Vyas http://jayunit100.blo...
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Author: Jay Vyas,
2012-11-09, 20:26
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Re: hadoop - running examples - MapReduce - [mail # user]
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...What do you mean immutable? Do u mean non modifiable maybe .? Immutable implies that they can't be deleted . Jay Vyas MMSB UCHC On Nov 8, 2012, at 5:28 PM, Mohammad T...
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Author: Jay Vyas,
2012-11-08, 22:31
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Re: Hadoop processing - MapReduce - [mail # user]
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...Hmm this is interesting. I think that: 1) For the map phases, hadoop is smart enough to try to run mappers locally, but i think you could force these DNs to actively participate ...
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Author: Jay Vyas,
2012-11-08, 14:49
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