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Re: reg max map task config - MapReduce - [mail # user]
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...There's probably different variables (esp. since you run HBase, calculated resources) involved for this, but you can generally find some reading material on this in books and http://wiki.apa...
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Author: Harsh J,
2013-01-28, 16:23
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Re: warnings from log4j -- where to look to resolve? - MapReduce - [mail # user]
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...Hi, Does your code instantiate and work with a self logger object? If so, is it a log4j instance or a commons logging one? On Mon, Jan 28, 2013 at 4:06 PM, Calvin wrote: &n...
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Author: Harsh J,
2013-01-28, 16:21
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Re: hadoop imbalanced topology - MapReduce - [mail # user]
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...Hi Jameson, Inline reply below for a specific point of yours ("scheduler deadlock"): On Mon, Jan 28, 2013 at 8:59 PM, Jameson Li wrote: This was a problem in earlier ...
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Author: Harsh J,
2013-01-28, 16:16
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Re: number of mapper tasks - MapReduce - [mail # user]
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...I'm unfamiliar with EMR myself (perhaps the question fits EMR's own boards) but here's my take anyway: On Mon, Jan 28, 2013 at 9:24 PM, Marcelo Elias Del Valle wrote: The f...
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Author: Harsh J,
2013-01-28, 16:02
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Re: what does the yarn.nodemanager.aux-services stand for - MapReduce - [mail # user]
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...Hi, The function of yarn.nodemanager.aux-services is to run any custom Service [1] implementations from the user, in the YARN NodeManager's runtime. The "aux" stands for auxiliary. &nb...
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Author: Harsh J,
2013-01-28, 15:48
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Re: what's this version 'version = 1.0.4-SNAPSHOT' ? - MapReduce - [mail # user]
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...Hi, This is a minor annoyance, cause we ship the release tarball with the build files still carrying -SNAPSHOT suffix. Your version is still 1.0.4 after build and isn't 'upgraded' as y...
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Author: Harsh J,
2013-01-28, 11:08
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Re: How does mapper process partial records? - MapReduce - [mail # user]
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...I don't quite get what you mean - we don't have such a flaw. The first split task makes sure to read one extra record, even if its last byte is a newline. The subsequent splits (that is, tho...
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Author: Harsh J,
2013-01-25, 08:50
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Re: How to Backup HDFS data ? - MapReduce - [mail # user]
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...You need some form of space capacity on the backup cluster that can withstand it. Lower replication ( wrote: Harsh J...
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Author: Harsh J,
2013-01-25, 06:23
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Re: Filesystem closed exception - MapReduce - [mail # user]
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...It is pretty much the same in 0.20.x as well, IIRC. Your two points are also correct (for a fix to this). Also see: https://issues.apache.org/jira/browse/HADOOP-7973. On Fri, Jan 25, 2...
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Author: Harsh J,
2013-01-25, 06:21
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Re: How does mapper process partial records? - MapReduce - [mail # user]
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...Hi Praveen, This is explained at http://wiki.apache.org/hadoop/HadoopMapReduce [Map section]. On Thu, Jan 24, 2013 at 10:20 PM, Praveen Sripati wrote: Harsh J...
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Author: Harsh J,
2013-01-24, 19:22
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