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Re: S3N copy creating recursive folders - MapReduce - [mail # user]
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...Subroto and Shumin Try adding a slash to to the s3n source: - hadoop fs -cp s3n://acessKey:[EMAIL PROTECTED]/srcData" /test/srcData + hadoop fs -cp s3n://acessKey:[EMAIL PR...
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Author: George Datskos,
2013-03-07, 07:51
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Re: some ideas for QJM and NFS - MapReduce - [mail # user]
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...Hi Azuryy, So you have measurements for hadoop-1.0.4 and hadoop-2.0.3+QJM, but I think you should also measure hadoop-2.0.3 _wihout_ QJM so you can know for sure if the per...
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Author: George Datskos,
2013-02-18, 06:47
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Re: Question related to Decompressor interface - MapReduce - [mail # user]
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...Hello The BlockDecompressorStream class is used for block-based decompression (e.g. snappy). Each chunk has a header indicating how many bytes it is. That header is ...
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Author: George Datskos,
2013-02-13, 00:58
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Re: xcievers - MapReduce - [mail # user]
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...Patai, You can use the getDataNodeStats() method of your your DistributedFileSystem instance. It returns an array of DatanodeInfo which contains, among other things,...
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Author: George Datskos,
2013-02-08, 00:07
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[MAPREDUCE-4490] JVM reuse is incompatible with LinuxTaskController (and therefore incompatible with Security) - MapReduce - [issue]
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...When using LinuxTaskController, JVM reuse (mapred.job.reuse.jvm.num.tasks > 1) with more map tasks in a job than there are map slots in the cluster will result in immediate task failures ...
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http://issues.apache.org/jira/browse/MAPREDUCE-4490
Author: George Datskos,
2012-08-10, 06:46
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[MAPREDUCE-4497] JobTracker webUI "Kill Selected Jobs" button has no effect - MapReduce - [issue]
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...When enabling the webinterface.private.actions property to true, the JobTracker displays additional buttons allowing the user to (1) kill jobs or (2) change the priority of a job. Howe...
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http://issues.apache.org/jira/browse/MAPREDUCE-4497
Author: George Datskos,
2012-07-31, 00:21
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Re: How to get the HDFS I/O information - MapReduce - [mail # user]
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...Qu, Every job has a history file that is, by default, stored under $HADOOP_LOG_DIR/history. These "job history" files list the amount of hdfs read/write (and lots of ...
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Author: George Datskos,
2012-04-25, 01:06
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Re: Reducer not firing - MapReduce - [mail # user]
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...Arko, Change Iterator to Iterable George On 2012/04/18 8:16, Arko Provo Mukherjee wrote:...
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Author: George Datskos,
2012-04-17, 23:59
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Re: Run mapreq job without hadoop script - MapReduce - [mail # user]
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...Yes you can this. Take a look at JobClient.runJob and JobClient.submitJob. George On 2012/04/06 7:50, GUOJUN Zhu wrote:...
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Author: George Datskos,
2012-04-05, 23:57
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Re: Best practices configuring libraries on the backend. - MapReduce - [mail # user]
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...Dmitriy I've tested it on hadoop 1.0.0 and 1.0.1. (I don't know which version cdh3u3 is based off of) In hadoop-env.sh if I set HADOOP_TASKTRACKER_OPTS="-Djava....
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Author: George Datskos,
2012-03-29, 00:04
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