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Re: Hadoop Installation Mappers setting - MapReduce - [mail # user]
...I am explaining it more. If your machine have 8 GB of memory. After reserving to Operating system and all other processes except tasktracker, you have 4 GB remaining(assume). The remaining p...
   Author: Amal G Jose, 2013-05-23, 17:33
Re: Is there a way to limit # of hadoop tasks per user at runtime? - MapReduce - [mail # user]
...You can use capacity scheduler also. In that you can create some queues, each of specific capacity. Then you can submit jobs to that specific queue at runtime or you can configure it as dire...
   Author: Amal G Jose, 2013-05-23, 17:25
Re: Permissions - MapReduce - [mail # user]
...After starting the hdfs, ie NN, SN and DN, create an hdfs directory structure in the form //mapred/staging. Then give 777 permission to staging. After that change the ownership of mapred dir...
   Author: Amal G Jose, 2013-05-10, 19:32
Re: ganglia net URL unavailable - MapReduce - [mail # user]
...Hi,  you can download the ganglia installables from http://pkgs.org/. I downloaded from here, installed and working fine.   Regards, Amal G Jose   On Mon, Apr 22, 2013 at 2:45...
   Author: Amal G Jose, 2013-04-22, 17:01
Re: HW infrastructure for Hadoop - MapReduce - [mail # user]
...+1 for Hadoop operations. There is one document from Hortonworks that explain hadoop cluster infrastructure. That doc is a brand specific. But after referring the hadoop operations, we can r...
   Author: Amal G Jose, 2013-04-16, 16:51
Re: jps show nothing but hadoop still running - MapReduce - [mail # user]
...One more issue can occur. If your system is installed with more than one java, this issue may occur. Openjdk may be present as default (jps is not present in openjdk). jps is present in sun ...
   Author: Amal G Jose, 2013-04-15, 18:20
Re: R environment with Hadoop - MapReduce - [mail # user]
...Rhipe is good. than RMR. RMR execution is juz like a streaming job. Rhipe 0.73 will work on CDH4 MR1. Rhipe versions below 0.73 will not work on CDH4.    On Sun, Apr 14, 2013 at 12...
   Author: Amal G Jose, 2013-04-15, 18:15
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