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From Sisu Xi <xis...@gmail.com>
Subject hadoop multinode, only master node doing the work
Date Sun, 13 Jul 2014 05:58:53 GMT
Hi, all:

I am new to hadoop. I followed the tutorial on

and installed hadoop 2.2.0 on two 4-core Ubuntu 12.04 machines.

I can start the pi program, however, only the master node is doing the work
(I checked the top on each machine).
Seems the two nodes are configured correctly, because I can start  the
program in the slave node as well, and still only the master node is doing
the actual work.
I have tried different number of mappers for the pi program, and the
results is the same.

Is there anything else I can check?

In the end is my configure file on each host.

Thanks very much!














  <description>The host and port that the MapReduce job tracker runs
  at.  If "local", then jobs are run in-process as a single map
  and reduce task.


*Sisu Xi, PhD Candidate*

Department of Computer Science and Engineering
Campus Box 1045
Washington University in St. Louis
One Brookings Drive
St. Louis, MO 63130

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