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Re: [Hadoop-Help]About Map-Reduce implementation - MapReduce - [mail # user]
...Hi Mayur,  Those 3 modes are 3 differents ways to use Hadoop, however, the only production mode here is the fully distributed one. The 2 others are more for local testing. How many node...
   Author: Jean-Marc Spaggiari, 2013-03-08, 03:00
Re: good way to measure and confirm. - MapReduce - [mail # user]
...Hi Patai,  You might think about installing Ganglia. That will give you all the details of the CPU usage. user vs io vs idle, etc.  JM  2013/3/7 Patai Sangbutsarakum :...
   Author: Jean-Marc Spaggiari, 2013-03-07, 19:22
Re: Is there a way to keep all intermediate files there after the MapReduce Job run? - MapReduce - [mail # user]
...Ling, do you have Hadoop: The Definitive Guide close-by?  I think I remember somewhere they said about keeping the intermediate files.  Take a look at keep.task.files.pattern... It...
   Author: Jean-Marc Spaggiari, 2013-03-01, 13:49
Re: Hadoop advantages vs Traditional Relational DB - MapReduce - [mail # user]
...Hi Oleg,  Have you asked google first?  http://indico.cern.ch/conferenceDisplay.py?confId=162202 http://www.wikidifference.com/difference-between-hadoop-and-rdbms/ http://iablog.sy...
   Author: Jean-Marc Spaggiari, 2013-02-25, 13:31
Re: childerror - MapReduce - [mail # user]
...Hi Fatih,  Have you looked in the logs files? Anything there?  JM  2013/2/24 Fatih Haltas  ...
   Author: Jean-Marc Spaggiari, 2013-02-25, 01:46
[expand - 3 more] - Re: About Hadoop Deb file - MapReduce - [mail # user]
...Hi Mayur,  Have you looked at the link I sent you?  http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/  It will show you where to set JA...
   Author: Jean-Marc Spaggiari, 2013-02-24, 14:51
Re: copy chunk of hadoop output - MapReduce - [mail # user]
...Hi Harsh,  My bad.  I read the example quickly and I don't know why I tought you used tail and not head.  head will work perfectly. But tail will not since it will need to rea...
   Author: Jean-Marc Spaggiari, 2013-02-20, 19:44
Re: In Compatible clusterIDs - MapReduce - [mail # user]
...Hi Nagarjuna,  Is it a test cluster? Do you have another cluster running close-by? Also, is it your first try?  It seems there is some previous data in the dfs directory which is n...
   Author: Jean-Marc Spaggiari, 2013-02-20, 15:40
Re: Mutiple dfs.data.dir vs RAID0 - MapReduce - [mail # user]
...@Michael: I have done some tests between RAID0, 1, JBOD and LVM on another server.  Results are there: http://www.spaggiari.org/index.php/hbase/hard-drives-performances LVM and JBOD wer...
   Author: Jean-Marc Spaggiari, 2013-02-11, 02:38
[expand - 1 more] - Re: How to installl FUSE with Hadoop 1.0.x? - MapReduce - [mail # user]
...Hi Harsh,  I have installed all the dependencies, but I'm trying to build the amd64 version, and I think it's not working because there is some hardcoded parameters for 32 bits.  h...
   Author: Jean-Marc Spaggiari, 2013-02-08, 17:17
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