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Re: How to installl FUSE with Hadoop 1.0.x? - MapReduce - [mail # user]
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...I recall having mentioned it before, but why not use the Apache Bigtop RPM/DEB build scripts to generate all these binaries in good package form for yourself? It also builds up the fuse exte...
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Author: Harsh J,
2013-02-08, 16:49
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Re: Secondary Sort example error - MapReduce - [mail # user]
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...Thanks, I managed to correlate proper line numbers. Are you using some form of custom serialization in your job code? That is, are your keys non-Writable types and are of some other ty...
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Author: Harsh J,
2013-02-07, 18:46
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Re: Secondary Sort example error - MapReduce - [mail # user]
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...Hey Ravi, What version of Hadoop is this exactly? (Type and send output of "hadoop version" if unsure) On Thu, Feb 7, 2013 at 11:55 PM, Ravi Chandran wrote: Ha...
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Author: Harsh J,
2013-02-07, 18:34
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Re: why does OldCombinerRunner pass Reporter.NULL to the combiner instead of the real reporter? - MapReduce - [mail # user]
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...I agree its a bug if there is a discrepancy between the APIs (we are supposed to be supporting both for the time being). Please do file a JIRA with a patch - there shouldn't be any harm in r...
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Author: Harsh J,
2013-02-07, 16:18
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Re: Creating files through the hadoop streaming interface - MapReduce - [mail # user]
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...The raw streaming interface has much issues of this manner. The python open(…, 'w') calls won't open files on HDFS, further. Perhaps, since you wish to use Python for its various advantages,...
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Author: Harsh J,
2013-02-07, 05:18
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Re: How to find HDFS folders file count. - MapReduce - [mail # user]
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...You have posted the "fs -count" command which is also the answer to your question - does it not help? On Wed, Feb 6, 2013 at 3:56 PM, Dhanasekaran Anbalagan wrote: H...
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Author: Harsh J,
2013-02-06, 16:08
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Re: Specific HDFS tasks where is passwordless SSH is necessary - MapReduce - [mail # user]
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...It isn't the NN that does the SSH technically, its the scripts we ship for an easier start/stop: http://wiki.apache.org/hadoop/FAQ#Does_Hadoop_require_SSH.3F So wherever you launch the...
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Author: Harsh J,
2013-02-05, 23:55
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Re: how to find top N values using map-reduce ? - MapReduce - [mail # user]
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...Note that a "one reducer" isn't always the solution. If you know your key space boundaries, consider using a total-order-partition to scale the app/job and make use of nodes on the cluster. ...
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Author: Harsh J,
2013-02-02, 18:05
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Re: what will happen when HDFS restarts but with some dead nodes - MapReduce - [mail # user]
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...Yes, if there are missing blocks (i.e. all replicas lost), and the block availability threshold is set to its default of 0.999f (99.9% availability required), then NN will not come out of sa...
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Author: Harsh J,
2013-01-30, 16:39
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Re: what will happen when HDFS restarts but with some dead nodes - MapReduce - [mail # user]
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...NN does recalculate new replication work to do due to unavailable replicas ("under-replication") when it starts and receives all block reports, but executes this only after out of safemode. ...
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Author: Harsh J,
2013-01-30, 16:27
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