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Re: Three Questions - MapReduce - [mail # user]
...On 05/03/2011 05:49 PM, Geoffry Roberts wrote:  My apologies, I sent you the wrong link.  Should be this:  http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/org/apache/hadoo...
   Author: David Rosenstrauch, 2011-05-03, 22:08
How to change logging level for an individual job - MapReduce - [mail # user]
...Is it possible to change the logging level for an individual job?  (As  opposed to the cluster as a whole.)  E.g., is there some key that I can  set on the job's configur...
   Author: David Rosenstrauch, 2011-04-13, 15:36
Re: change number of slots in MR - MapReduce - [mail # user]
...On 03/25/2011 03:07 PM, Pedro Costa wrote:  Sorry, my mistake.  Set these in the mapred-site.xml file on each node:      mapred.tasktracker.reduce.tasks.maximum &nbs...
   Author: David Rosenstrauch, 2011-03-25, 19:25
Re: A way to monitor HDFS for a file to come live, and then kick off a job? - MapReduce - [mail # user]
...On 03/24/2011 01:09 PM, Jonathan Coveney wrote:  I suppose you could do this using HDFS, but this sounds to me like  Zookeeper is much better suited to this type of application. &n...
   Author: David Rosenstrauch, 2011-03-24, 17:16
Re: Sequence File usage queries - MapReduce - [mail # user]
...On 02/23/2011 07:24 PM, Mapred Learn wrote:  We wrote our own sequence file dumper app.  DR...
   Author: David Rosenstrauch, 2011-03-08, 00:21
Job-wide cleanup functionality? - MapReduce - [mail # user]
...Perhaps this has been covered before, but I wasn't able to dig up any info.  Is there any way to run a custom "job cleanup" for a map/reduce job?  I  know that each map and re...
   Author: David Rosenstrauch, 2011-02-03, 16:39
Re: How to set object in Configuration - MapReduce - [mail # user]
...On 01/26/2011 05:43 AM, Joan wrote:  The object needs to be a String or something that is easily convertible  to a String (e.g., integer).  This is so it can be serialized and...
   Author: David Rosenstrauch, 2011-01-26, 15:52
Re: Dose one map instance only handle one input path at the same time? - MapReduce - [mail # user]
...Take a look at CombineFileInputFormat.  DR  On 01/21/2011 09:24 AM, lei liu wrote: o I , so ample: " dentity are...
   Author: David Rosenstrauch, 2011-01-21, 14:49
Re: how to write custom object using M/R - MapReduce - [mail # user]
...Maybe change "id" to be an IntWritable, and "str" to be a Text?  HTH,  DR  On 01/19/2011 09:36 AM, Joan wrote: ); ect. ob h"); )); 0000 ) 83) 51) 32) ize(SequenceFileRecordRea...
   Author: David Rosenstrauch, 2011-01-19, 20:04
Re: question for understanding partitioning - MapReduce - [mail # user]
...On 01/18/2011 03:09 PM, Mapred Learn wrote:  You should probably read the Yahoo tutorial to brush up on the topic  before asking on the list.  http://developer.yahoo.com/hadoo...
   Author: David Rosenstrauch, 2011-01-18, 20:32
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