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Re: OK to run data node on same machine as secondary name node? - MapReduce - [mail # user]
...Very helpful info.  I hadn't considered the bandwidth aspect of it.  Thanks much, Harsh!  DR  On 08/16/2012 12:58 AM, Harsh J wrote:...
   Author: David Rosenstrauch, 2012-08-16, 17:11
Re: Distributing Keys across Reducers - MapReduce - [mail # user]
...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...
   Author: David Rosenstrauch, 2012-07-20, 14:45
Re: Out of memory (heap space) errors on job tracker - MapReduce - [mail # user]
...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...
   Author: David Rosenstrauch, 2012-06-12, 21:22
[MAPREDUCE-2002] MRUnit driver classes should provide ability to set a configuration object to be passed into the mapper/reducer - MapReduce - [issue]
...Short description:Enhance the org.apache.hadoop.mrunit.mapreduce.MapDriver, ReduceDriver, and MapReduceDriver unit test driver classes to contain "setConfiguration" and "withConfiguration" m...
http://issues.apache.org/jira/browse/MAPREDUCE-2002    Author: David Rosenstrauch, 2012-03-15, 07:47
Re: Partitioners - How to know if they are working - MapReduce - [mail # user]
...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. ...
   Author: David Rosenstrauch, 2012-02-17, 04:15
Re: Analysing Completed Job info programmatically apart from Jobtracker GUI - MapReduce - [mail # user]
...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...
   Author: David Rosenstrauch, 2011-12-14, 16:06
Re: Overriding remote classes - MapReduce - [mail # user]
...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...
   Author: David Rosenstrauch, 2011-12-14, 16:04
Re: how to implement error thresholds in a map-reduce job ? - MapReduce - [mail # user]
...I can't think of an easy way to do this.  There's a few not-so-easy  approaches:  * Implement numErrors as a Hadoop counter, and then have the application  which submitte...
   Author: David Rosenstrauch, 2011-11-15, 20:55
Re: Custom Hadoop metrics in Map Reduce jobs - MapReduce - [mail # user]
...On 11/02/2011 03:44 AM, Dino Kečo wrote:  is  You can create your own custom counters, to count particular statistics  you're interested in.  That can take you a long way...
   Author: David Rosenstrauch, 2011-11-02, 15:36
Re: Avro 1.5.x version compatibility - MapReduce - [mail # user]
...On 09/30/2011 01:35 AM, Sudharsan Sampath wrote:  Possibly.  IIRC, when I tried to use a newer version of Avro in our M/R  jobs I ran into this issue:  https://issues.apa...
   Author: David Rosenstrauch, 2011-10-03, 20:19
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