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OK to run data node on same machine as secondary name node? - MapReduce - [mail # user]
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...I have a Hadoop cluster that's a little tight on resources. I was thinking one way I could solve this could be by running an additional data node on the same machine as the...
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Author: David Rosenstrauch,
2012-08-15, 22:11
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Re: Distributing Keys across Reducers - MapReduce - [mail # user]
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...On 07/20/2012 09:20 AM, Dave Shine wrote: Hadoop lets you override the default partitioner and replace it with your own. This lets you write a custom partitioning scheme wh...
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Author: David Rosenstrauch,
2012-07-20, 14:45
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Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
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...On 06/10/2012 08:39 PM, Arun C Murthy wrote: That's actually the situation we have - one user, submitting multiple jobs, each with several thousand map steps. I'll give tha...
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Author: David Rosenstrauch,
2012-06-12, 21:22
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Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
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...I'll give that a shot, thanks. DR On 06/10/2012 01:40 AM, Harsh J wrote:...
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Author: David Rosenstrauch,
2012-06-12, 21:20
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Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
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...We're running 0.20.2 (Cloudera cdh3u4). What configs are you referring to? Thanks, DR On 06/08/2012 02:59 PM, Arun C Murthy wrote:...
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Author: David Rosenstrauch,
2012-06-08, 19:07
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Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
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...Our job tracker has been seizing up with Out of Memory (heap space) errors for the past 2 nights. After the first night's crash, I doubled the heap space (from the default ...
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Author: David Rosenstrauch,
2012-06-08, 15:26
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[MAPREDUCE-2002] MRUnit driver classes should provide ability to set a configuration object to be passed into the mapper/reducer - MapReduce - [issue]
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...Short description:Enhance the org.apache.hadoop.mrunit.mapreduce.MapDriver, ReduceDriver, and MapReduceDriver unit test driver classes to contain "setConfiguration" and "withConfiguration" m...
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http://issues.apache.org/jira/browse/MAPREDUCE-2002
Author: David Rosenstrauch,
2012-03-15, 07:47
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Re: Partitioners - How to know if they are working - MapReduce - [mail # user]
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...On 02/16/2012 12:49 PM, [EMAIL PROTECTED] wrote: At my last job we wrote a custom partitioner, and we tested it out completely outside of Hadoop using standard JUnit unit tests. ...
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Author: David Rosenstrauch,
2012-02-17, 04:15
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Re: Analysing Completed Job info programmatically apart from Jobtracker GUI - MapReduce - [mail # user]
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...On 12/14/2011 09:39 AM, arun k wrote: See: http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapreduce/Job.html#getCounters%28%29 DR...
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Author: David Rosenstrauch,
2011-12-14, 16:06
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Re: Overriding remote classes - MapReduce - [mail # user]
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...On 12/14/2011 08:20 AM, John Armstrong wrote: I ran into the same (known) issue. (See: https://issues.apache.org/jira/browse/MAPREDUCE-1700) Doesn't look like there's...
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Author: David Rosenstrauch,
2011-12-14, 16:04
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