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Re: Parameter 'yarn.nodemanager.resource.cpu-cores' does not work - MapReduce - [mail # user]
...Hi Sandy,  Thanks to your detailed explanation! But I am still not very clear. In my current cluster with Hadoop-2.0.3-alpha, how to enable the properties 'yarn.nodemanager.resource.cpu...
   Author: sam liu, 2013-07-23, 03:01
Re: How to write/run MPI program on Yarn? - MapReduce - [mail # user]
...Thanks Pramod and Clark!  1. What's the relationship of Hadoop 2.x branch and mpich2-yarn project? 2. Does Hadoop 2.x branch plan to include MPI implementation? I mentioned there is alr...
   Author: sam liu, 2013-07-01, 02:48
[MAPREDUCE-5026] For shortening the time of TaskTracker heartbeat, decouple the statics collection operations - MapReduce - [issue]
...In each heartbeat of TaskTracker, it will calculate some system statics, like the free disk space, available virtual/physical memory, cpu usage, etc. However, it's not necessary to calculate...
http://issues.apache.org/jira/browse/MAPREDUCE-5026    Author: sam liu, 2013-06-28, 02:43
How Yarn execute MRv1 job? - MapReduce - [mail # user]
...Hi,  1.In Hadoop 1.x, a job will be executed by map task and reduce task together, with a typical process(map > shuffle > reduce). In Yarn, as I know, a MRv1 job will be executed ...
   Author: sam liu, 2013-06-19, 02:46
Re: Why my tests shows Yarn is worse than MRv1 for terasort? - MapReduce - [mail # user]
...Hi Harsh,  Thanks for your detailed response! Now, the efficiency of my Yarn cluster improved a lot after increasing the reducer number(mapreduce.job.reduces) in mapred-site.xml. But I ...
   Author: sam liu, 2013-06-18, 08:58
Re: The minimum memory requirements to datanode and namenode? - MapReduce - [mail # user]
...I can issue a command 'hadoop dfsadmin -report', but it did not return any result for a long time. Also, I can open the NN UI(http://namenode:50070), but it is always keeping in the connecti...
   Author: sam liu, 2013-05-13, 06:22
Re: Why could not find finished jobs in yarn.resourcemanager.webapp.address? - MapReduce - [mail # user]
...That's the cause. After setting mapreduce.framework.name to YARN in mapred-site.xml, the MR job could be found in the 'FINISHED Applications' tab now. Thanks very much!   2013/5/3 Sandy...
   Author: sam liu, 2013-05-03, 02:58
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