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RE: How to balance reduce job - MapReduce - [mail # user]
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...The typical Partitioner method for assigning reducer r from reducers R is r = hash(key) % count(R) However if you find your partitioner is assigning your data to too few or one r...
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Author: Tony Burton,
2013-05-07, 15:13
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RE: Group names for custom Counters - MapReduce - [mail # user]
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...Thanks Michel! Looks like that’ll do the trick. It wasn’t clear originally from the docs that context.getCounter(groupName, counterName) will create the group and counter if they don’t...
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Author: Tony Burton,
2013-03-25, 11:02
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Group names for custom Counters - MapReduce - [mail # user]
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...Hi list, I'm using Hadoop 1.0.3 and creating some custom Counters in my Mapper. I've got an enum that defines the list of counters, and I'm incrementing in the map function using conte...
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Author: Tony Burton,
2013-03-22, 15:17
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RE: Map output compression in Hadoop 1.0.3 - MapReduce - [mail # user]
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...Hi Andy and list, Apologies - I've not been looking at my list inbox for a while, so missed this request. I'm running some tests as I type, and will report back when they're done. I'm ...
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Author: Tony Burton,
2012-12-19, 09:19
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[MAPREDUCE-4616] Improvement to MultipleOutputs javadocs - MapReduce - [issue]
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...In the new API, and using MultipleOutputs it is possible to segment output into directories by using MultipleOutputs.write(KEYOUT key, VALUEOUT value, String baseOutputPath) in the Reducer t...
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http://issues.apache.org/jira/browse/MAPREDUCE-4616
Author: Tony Burton,
2012-10-12, 17:04
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RE: first Jira submission: what happens next? - MapReduce - [mail # dev]
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...Hi, Sorry to sound like a scratched record - what's happening with https://issues.apache.org/jira/browse/MAPREDUCE-4616? Is there anything I need to do? (apart from send occasional rem...
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Author: Tony Burton,
2012-10-11, 17:05
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RE: hadoop trunk build failure - yarn, surefire related? - MapReduce - [mail # user]
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...Another "mvn test" caused the build to fail slightly further down the road. As my Jira issue is documentation-only, I've submitted the patch anyway. Is this multiple-failure scen...
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Author: Tony Burton,
2012-09-11, 15:42
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RE: hadoop trunk build failure - yarn, surefire related? - MapReduce - [mail # user]
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...Good suggestions Harsh and Hemanth. When I was asked to submit a patch for hadoop 1.0.3, I thought it a good ex ercise to work through the build process to become familiar even though ...
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Author: Tony Burton,
2012-09-11, 11:14
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RE: hadoop trunk build failure - yarn, surefire related? - MapReduce - [mail # user]
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...That's good to know - is there a more up to date guide than http://wiki.apa che.org/hadoop/HowToContribute which still makes many references to ant bui lds? From: Harsh J [mail...
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Author: Tony Burton,
2012-09-11, 10:39
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RE: hadoop trunk build failure - yarn, surefire related? - MapReduce - [mail # user]
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...Ok - thanks Harsh. Following Steve's earlier advice I tried the mvn install, which worked fine , then ant test in hadoop-mapreduce-project which failed. I was mid-email t o mapreduce-d...
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Author: Tony Burton,
2012-09-11, 10:31
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