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Re: Configuration object not loading parameters in unit tests - Hadoop - [mail # user]
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...Is there a way to have the Configuration report wether or not it was able / unable to find the default configuration resources? It looks at the moment that it simply prints out all the resou...
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Author: Jay Vyas,
2013-01-16, 19:49
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Re: FileSystem.workingDir vs mapred.local.dir - Hadoop - [mail # user]
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...what do you mean by "workingdir for a filesystem" ? I never thought that a fileSystem should need or have a special workingDir ? On Tue, Jan 15, 2013 at 12:43 PM, Hemanth Yamija...
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Author: Jay Vyas,
2013-01-15, 18:47
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Re: Hello and request some advice. - Hadoop - [mail # user]
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...for the basics, all you need is a java IDE . Hadoop Map/Reduce can run in local filesystem mode without any kind of HDFS backing. On Fri, Jan 4, 2013 at 12:45 PM, Nitin Pawar wr...
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Author: Jay Vyas,
2013-01-04, 17:47
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Re: Input splits for sequence file input - Hadoop - [mail # user]
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...This question is fundamentally flawed : it assumes that a mapper will ask for anything. The mapper class "run" method reads from a record reader. The question you really should a...
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Author: Jay Vyas,
2012-12-03, 05:52
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Other file systems for hadoop - Hadoop - [mail # user]
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...what are the minimal requirements to implement the filesystem interface for hdfs? I was thinking it might be cool to directly implement a 100% memory filesystem, just for the hell of i...
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Author: Jay Vyas,
2012-10-30, 15:46
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Broad question on sorting of mapper outputs. - Hadoop - [mail # user]
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...IS there any documentation on the internals of the shuffle and sort phase? The elephant book seems to be the best source, but it appears to only lightly touch upon the "magic" part (i.e. the...
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Author: Jay Vyas,
2012-10-20, 03:19
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33%, 66%, and 100% *reducer* optimization - Hadoop - [mail # user]
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...Hi guys ! We all know that there are major milestones in reducers (33%, 66%) In particular: Im wondering: What should we optimize for in case a job hangs at 33%, as compare...
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Author: Jay Vyas,
2012-10-15, 21:32
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Re: Suitability of HDFS for live file store - Hadoop - [mail # user]
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...Seems like a heavyweight solution unless you are actually processing the images? Wow, no mapreduce, no streaming writes, and relatively small files. Im surprised that you are con...
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Author: Jay Vyas,
2012-10-15, 20:21
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speculative execution before mappers finish - Hadoop - [mail # user]
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...Is it possible for reducers to start (not just copying, but actually) "reducing" before all mappers are done, speculatively? In particular im asking this because Im curious about the i...
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Author: Jay Vyas,
2012-10-13, 02:16
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pojo writables - Hadoop - [mail # user]
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...One of the benefits of using autogenerated objects for serialization, we are finding, is just the fact that there is a strong, semantically meaningful API. This could seemingly be done...
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Author: Jay Vyas,
2012-10-08, 14:13
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