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Re: custom task cleanup even when task is killed? - MapReduce - [mail # user]
...On 09/12/2010 02:38 AM, Chase Bradford wrote:  Just like there's a "setup(Mapper.Context context)" method, there's also  a "cleanup(Mapper.Context context)" method for just this pu...
   Author: David Rosenstrauch, 2010-09-13, 18:28
Re: How to architecture large initialization in map task - MapReduce - [mail # user]
...On 09/10/2010 02:18 AM, Angus Helm wrote:  The way I handled this type of situation recently was to extract the  data from the DB into an HDFS file (a SequenceFile), rather than ha...
   Author: David Rosenstrauch, 2010-09-13, 18:23
Re: Adding log messages to src files, but they don't appear in logs ... - MapReduce - [mail # user]
...On 09/08/2010 05:00 AM, Rita Liu wrote:  Simple - Hadoop is a distributed system, designed to run on a cluster of  machines.  Since WordCount.java runs on your local (client) ...
   Author: David Rosenstrauch, 2010-09-08, 14:09
[expand - 1 more] - Re: how to implement post-mapper processing - MapReduce - [mail # user]
...On 08/25/2010 10:36 AM, Anfernee Xu wrote:  Well then you could put your post-processing in Mapper.cleanup.  http://hadoop.apache.org/common/docs/r0.20.1/api/org/apache/hadoop/mapr...
   Author: David Rosenstrauch, 2010-08-25, 15:08
Re: hadoop 0.20 migration for JobClient? - MapReduce - [mail # user]
...On 08/23/2010 12:25 PM, Steve Hoffman wrote:  Sounds like this bug, which is fixed in Hadoop version 0.20.3.  https://issues.apache.org/jira/browse/MAPREDUCE-118  DR...
   Author: David Rosenstrauch, 2010-08-23, 16:30
Viewing counters in history job - MapReduce - [mail # user]
...I had a job that I ran a few days ago that rolled over to the Job  tracker history.  Now when I go view it in the history viewer although I  can see basic stats such as total ...
   Author: David Rosenstrauch, 2010-08-23, 15:30
Configuring # task slots - MapReduce - [mail # user]
...Was reading up a bit today on configuring the settings for # task slots,  namely:  mapred.tasktracker.map.tasks.maximum mapred.tasktracker.reduce.tasks.maximum  Was just wonde...
   Author: David Rosenstrauch, 2010-08-19, 18:46
[expand - 1 more] - Re: Null mapper? - MapReduce - [mail # user]
...On 08/16/2010 05:48 PM, Ted Yu wrote:  Um ...  Sorry, but I'm not clear.  Which of the 2 questions were you answering  "no" to?  :-)  I'm guessing the first.? &...
   Author: David Rosenstrauch, 2010-08-16, 22:21
[expand - 1 more] - Re: How to work around MAPREDUCE-1700 - MapReduce - [mail # user]
...On 08/12/2010 07:02 PM, Ted Yu wrote:  Thanks for the reply Ted.  If I understand correctly, you're suggesting we keep our own customized  hadoop installation, which we'd inst...
   Author: David Rosenstrauch, 2010-08-12, 23:21
[expand - 2 more] - Re: Preferred way to submit a job? - MapReduce - [mail # user]
...On 08/12/2010 12:10 AM, Harsh J wrote:  Actually, turns out that using an hdfs URI for the JT works just fine.  The problem turned out to be elsewhere.  (Gory details:  I...
   Author: David Rosenstrauch, 2010-08-12, 13:48
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