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[MAPREDUCE-3476] Optimize YARN API calls - MapReduce - [issue]
...Several YARN API calls are taking inordinately long. This might be a performance blocker....
http://issues.apache.org/jira/browse/MAPREDUCE-3476    Author: Ravi Prakash, 2014-04-22, 20:13
[MAPREDUCE-4711] Append time elapsed since job-start-time for finished tasks - MapReduce - [issue]
...In 0.20.x/1.x, the analyze job link gave this informationThe last Map task task_<sometask> finished at (relative to the Job launch time): 5/10 20:23:10 (1hrs, 27mins, 54sec)The time it...
http://issues.apache.org/jira/browse/MAPREDUCE-4711    Author: Ravi Prakash, 2014-04-17, 10:27
[MAPREDUCE-3406] Add node information to bin/mapred job -list-attempt-ids and other improvements - MapReduce - [issue]
...From Ramya SunilProviding the NM information where the containers are scheduled in bin/mapred job -list-attempt-ids will be helpful in automation, debugging and to avoid grepping through the...
http://issues.apache.org/jira/browse/MAPREDUCE-3406    Author: Ravi Prakash, 2014-04-16, 16:26
[MAPREDUCE-5317] Stale files left behind for failed jobs - MapReduce - [issue]
...Courtesy Amar Kamat!We are seeing _temporary files left behind in the output folder if the jobfails.The job were failed due to hitting quota issue.I simply ran the randomwriter (from hadoop ...
http://issues.apache.org/jira/browse/MAPREDUCE-5317    Author: Ravi Prakash, 2014-02-07, 20:51
Re: How / when does On-disk merge work? - MapReduce - [mail # user]
...Hi!  Tom White's "Hadoop: The Definitive Guide" is probably the best source for information on this (apart from the code itself ;-) Look at MergeManagerImpl.java btw in case you are so ...
   Author: Ravi Prakash, 2013-10-28, 14:15
Re: Reduce Merge Memtomem Parameter - MapReduce - [mail # user]
...Hi!  This parameter triggers a sort of fetched map outputs on the reducer node when the number of in memory map outputs > memToMemMergeOutputsThreshold . It is disabled by default. I...
   Author: Ravi Prakash, 2013-10-28, 14:02
Re: Trash in yarn - MapReduce - [mail # user]
...Hi Siddharth,  The Trash feature is enabled by setting "fs.trash.interval" . I'm not sure about your question on hive. What do you mean by the trash helping with dropped tables?   ...
   Author: Ravi Prakash, 2013-10-28, 13:38
Re: dynamically resizing the Hadoop cluster? - MapReduce - [mail # user]
...Hi Nan!  If the task trackers stop heartbeating back to the JobTracker, the JobTracker will mark them as dead and reschedule the tasks which were running on that TaskTracker. Admittedly...
   Author: Ravi Prakash, 2013-10-24, 20:51
Re: hadoop2.2.0 compile Failed - no such instruction - MapReduce - [mail # user]
...Hi Rico!  What was the command line you used to build?      On Wednesday, October 23, 2013 11:44 PM, codepeak  wrote:   Hi all,        I have a problem when com...
   Author: Ravi Prakash, 2013-10-24, 18:07
Re: Hadoop core jar class update - MapReduce - [mail # user]
...Viswanathan,  What version of Hadoop are you using? What is the change?      On Wednesday, October 23, 2013 2:20 PM, Viswanathan J  wrote:   Hi guys, If I updat...
   Author: Ravi Prakash, 2013-10-24, 17:55
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