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Re: question about when shuffle/sort start working - Hadoop - [mail # user]
...Jianmin Woo wrote:  You can define static variables in your Mapper/Reducer class. Static  variables will survive till the jvm is live. So multiple tasks of same  job running i...
   Author: Sharad Agarwal, 2009-06-04, 04:59
Re: streaming a binary processing file - Hadoop - [mail # user]
...Binary support has been added for 0.21. One option is to wait for 0.21  to get released, or you might try applying the patch from HADOOP-1722.   - Sharad...
   Author: Sharad Agarwal, 2009-06-04, 04:44
Re: problem getting map input filename - Hadoop - [mail # user]
...conf.get("map.input.file") should work. If not, then it is a bug in new  mapreduce api in 0.20  - Sharad...
   Author: Sharad Agarwal, 2009-06-03, 07:31
Test directory structure is Refactored - Hadoop - [mail # dev]
...After the commit of HADOOP-5135 (Separate the core, hdfs and mapred  junit tests), the directory structure of src/test has changed. Folder  src/test/org has been removed. All patch...
   Author: Sharad Agarwal, 2009-05-11, 05:26
Re: move tasks to another machine on the fly - Hadoop - [mail # user]
... Yes. If task fails then it is retried, preferably on a different  machine. This is called speculative execution. Jobtracker monitors the progress of tasks and if progress for an i...
   Author: Sharad Agarwal, 2009-05-07, 11:43
Re: multi-line records and file splits - Hadoop - [mail # user]
...The split doesn't need to be at the record boundary. If a mapper gets a partial record, it will seek to another split to get the full record.  - Sharad...
   Author: Sharad Agarwal, 2009-05-06, 12:25
Re: PIG and Hive - Hadoop - [mail # user]
...see core-user mail thread with subject "HBase, Hive, Pig and other  Hadoop based technologies"  - Sharad  Ricky Ho wrote: for Map/Reduce programming ?  ...
   Author: Sharad Agarwal, 2009-05-06, 11:55
Re: specifying command line args, but getting an NPE - Hadoop - [mail # user]
... yes, Configuration must be set up before instantiating the Job object.  However, some job parameters can be changed (before the actual job submission) by calling set methods on Jo...
   Author: Sharad Agarwal, 2009-05-05, 05:07
Re: Changing output file format and name - Hadoop - [mail # user]
...See MultipleOutputFormat.You may require to implement your custom  OutputFormat.  - Sharad  ...
   Author: Sharad Agarwal, 2009-05-04, 06:50
Re: Implementing compareTo in user-written keys where one extends the other is error prone - Hadoop - [mail # user]
...Marshall Schor wrote: The overridden method must have same arguments as the parent class method. Otherwise it is just another method, not an overridden one. In your case, if the current code...
   Author: Sharad Agarwal, 2009-05-04, 06:38
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