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Keeping Map-Tasks alive - MapReduce - [mail # user]
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...Hi, Is there a way to keep a map-task alive after it has finished its work, to later perform another task on its same input? For example, consider the k-means clustering algorithm (k-means d...
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Author: Yaron Gonen,
2012-08-05, 10:47
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Keeping intermediate results - MapReduce - [mail # user]
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...Hi, Suppose I have chained M/R jobs that traverse a graph and look for nodes with a specific value. Every time a Map encounters that value, I'd like to keep that node in the final result. I ...
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Author: Yaron Gonen,
2011-11-06, 16:21
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Re: Mapper Getting the whole split and not just line by line - MapReduce - [mail # user]
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...thanks! I'll try overriding the run method first. On Wed, Oct 12, 2011 at 3:18 PM, Harsh J wrote: e t rs...
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Author: Yaron Gonen,
2011-10-12, 19:14
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Re: Mapper Getting the whole split and not just line by line - MapReduce - [mail # user]
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...Thanks for the fast reply! I've dug in the code a little bit, and it seems to me that I can achieve my goal by overloading Mapper.run method: just iterate over the whole split by using conte...
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Author: Yaron Gonen,
2011-10-12, 11:44
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Mapper Getting the whole split and not just line by line - MapReduce - [mail # user]
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...Hi, The map method in the Mapper gets as a parameter a single line from the split. Is there a way for Mappers to get the whole split as input? I'd like to scan the whole split before I decid...
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Author: Yaron Gonen,
2011-10-12, 09:12
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Re: Submitting a Hadoop task from withing a reducer - MapReduce - [mail # user]
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...Thanks guys. I'll dig a little in Yarn. On Tue, Oct 4, 2011 at 6:28 PM, Joey Echeverria wrote: ...
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Author: Yaron Gonen,
2011-10-05, 13:50
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Submitting a Hadoop task from withing a reducer - MapReduce - [mail # user]
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...Hi, Hadoop tasks are always stacked to form a linear user-managed workflow (a reduce step cannot start before all previous mappers have stopped etc). This may be problematic in recursive tas...
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Author: Yaron Gonen,
2011-10-04, 15:45
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Re: How to pass a parameter across the cluster. - MapReduce - [mail # user]
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...There is no "right way". I think the best thing to do is to ask in the forums. I thought maybe via the Configuration object, but this is by no way a formal solution. On Wed, Sep 7, 20...
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Author: Yaron Gonen,
2011-09-07, 12:11
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