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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
[expand - 1 more] - 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
Re: map container is assigned default memory size rather than user configured which will cause TaskAttempt failure - MapReduce - [mail # user]
...Manu!  This should not be the case. All tasks should have the configuration values you specified propagated to them. Are you sure your setup is correct? Are they always the same nodes w...
   Author: Ravi Prakash, 2013-10-23, 17:40
[expand - 1 more] - Re: ResourceManager webapp code runs OOM - MapReduce - [mail # user]
...Hi Prashant!  You're welcome. I believe for MR JHS it ought to be mapreduce.jobhistory.joblist.cache.size  HTH Ravi     On Tuesday, October 22, 2013 7:29 PM, Prashant Kom...
   Author: Ravi Prakash, 2013-10-23, 17:32
Re: issure about different heapsize on namenode and datanode - MapReduce - [mail # user]
...Hi!  You can go to the JMX page: http://:50070/jmx to find out what the Heap Memory and usage is. Yes we know that there is a problem in the scripts. I believe its being handled as part...
   Author: Ravi Prakash, 2013-10-18, 15:10
Re: Yarn never use TeraSort#TotalOrderPartitioner when run TeraSort job? - MapReduce - [mail # user]
...Sam, I would guess that the jar file you think is running, is not actually the one. I am guessing that in the task classpath, there is a normal jar file (without your changes) which is being...
   Author: Ravi Prakash, 2013-10-18, 15:05
[expand - 1 more] - Re: modify HDFS - MapReduce - [mail # user]
...Karim!  Hadoop 3.0 corresponds to trunk currently. I would recommend you to use branch-2. Its fairly stable. hadoop-1.x is rather old and is in maintenance mode now. You can get all the...
   Author: Ravi Prakash, 2013-10-02, 19:31
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