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[MAPREDUCE-467] Collect information about number of tasks succeeded / total per time unit for a tasktracker. - MapReduce - [issue]
...Collecting information of number of tasks succeeded / total per tasktracker and being able to see these counts per hour, day and since start time will help reason about things like the black...
http://issues.apache.org/jira/browse/MAPREDUCE-467    Author: Hemanth Yamijala, 2010-08-24, 21:13
Re: Profiling Hadoop Map Reduce with the 20.2 API - MapReduce - [mail # user]
...David,    Is  Forrest documentation for MapReduce (http://hadoop.apache.org/common/docs/r0.20.0/mapred_tutorial.html) should be updated. I do see there is mention of these configur...
   Author: Hemanth Yamijala, 2010-08-17, 06:19
Re: What's speculative tasks - MapReduce - [mail # user]
...Pedro,  On Sun, Jul 25, 2010 at 7:33 PM, Pedro Costa  wrote:  When the MR framework detects that some tasks are running slower than others in the job, it has an option to laun...
   Author: Hemanth Yamijala, 2010-07-26, 04:21
[MAPREDUCE-591] TestStreamingStderr fails occassionally - MapReduce - [issue]
...TestStreamingStderr fails occassionally with a timeout on trunk....
http://issues.apache.org/jira/browse/MAPREDUCE-591    Author: Hemanth Yamijala, 2010-07-06, 10:44
Re: Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out. - MapReduce - [mail # user]
...Hi,  Sorry, I couldn't take a close look at the logs until now. Unfortunately, I could not see any huge difference between the success and failure case. Can you please check if things l...
   Author: Hemanth Yamijala, 2010-07-06, 08:34
[MAPREDUCE-763] Capacity scheduler should clean up reservations if it runs tasks on nodes other than where it has made reservations - MapReduce - [issue]
...Currently capacity scheduler makes a reservation on nodes for high memory jobs that cannot currently run at the time. It could happen that in the meantime other tasktrackers become free to r...
http://issues.apache.org/jira/browse/MAPREDUCE-763    Author: Hemanth Yamijala, 2010-07-02, 00:04
Re: Partition - Distribution of map outputs - MapReduce - [mail # user]
...Pedro,  On Thu, Jul 1, 2010 at 3:37 AM, Pedro Costa  wrote:  The number of mappers created will depend on the number of 'InputSplits' generated for the program inputs. How to ...
   Author: Hemanth Yamijala, 2010-07-01, 02:37
Re: Who creates job.jar? - MapReduce - [mail # user]
...Pedro,    job.jar is a name given by the Map/Reduce framework to any jar that is submitted with the map, reduce and other user classes. So, in your case the examples.jar is submitt...
   Author: Hemanth Yamijala, 2010-06-25, 10:32
Re: Custom File reader - MapReduce - [mail # user]
...Steven,   I can .  Could you look at JobConf.setInputFormat() API to set your input format ?  Thanks Hemanth...
   Author: Hemanth Yamijala, 2010-06-25, 04:43
Re: How many ports and processes are open/created in MR? - MapReduce - [mail # user]
...Pedro,   There are 2 daemons that are launched when the MapReduce framework starts - JobTracker and TaskTracker. Every map or reduce task runs in a separate process called Child (you co...
   Author: Hemanth Yamijala, 2010-06-24, 02:00
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