reply: how do I know the datanode slave status

2008-12-11 Thread koven 
You can press http://localhost(namenode):50030 in you IE or Firefox
And find the cluster status

koven
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---
Hi,

   Is it possible to findout the status of the datanode salve? I want to  
know the details like
 - is the slave is running?
 - when the last data received?
 - any critical problem as of now?

With regards,
R. SANTHANA GOPALAN.


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reply: When I system.out.println() in a map or reduce, where does it go?

2008-12-10 Thread koven 
The best method is find them in web.
If hadoop-default.xml,find it
property
  namemapred.job.tracker.http.address/name
  value0.0.0.0:50030/value
  description
The job tracker http server address and port the server will listen on.
If the port is 0 then the server will start on a free port.
  /description
/property
If you open the port 50030,then you can check the System.out.println() at
the web