Phantom wrote:
I am trying to run Hadoop on a cluster of 3 nodes. The namenode and the
jobtracker web UI work. I have the namenode running on node A and job
tracker running on node B. Is it true that namenode and jobtracker cannot
run on the same box ?
The namenode and the jobtracker can most definitely run on the same box.
As far as I know this is the preferred configuration.
Also if I want to run the examples on the cluster is
there anything special that needs to be done. When I run the example
WordCount on a machine C (which is a task tracker and not a job tracker)
the
LocalJobRunner is invoked all the time. I am guessing this means that the
map tasks are running locally. How can I distribute this on the cluster ?
Please advice.
Are the conf files on machine C the same as the namenode/jobtracker?
Are they pointing to the namenode and jobtracker or are they pointing to
local in the hadoop-site.xml file. Also we have found it easier
(although not necessarily better) to start tasks on the namenode server.
It would be helpful to have more information about what is happening and
your setup as that would help myself and others on the list debug what
may be occurring.
Dennis Kubes
Thanks
Avinash
