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From Joey Echeverria <j...@cloudera.com>
Subject Re: Adding nodes
Date Fri, 02 Mar 2012 00:57:01 GMT
Not quite. Datanodes get the namenode host from fs.defalt.name in core-site.xml. Task trackers
find the job tracker from the mapred.job.tracker setting in mapred-site.xml. 

Sent from my iPhone

On Mar 1, 2012, at 18:49, Mohit Anchlia <mohitanchlia@gmail.com> wrote:

> On Thu, Mar 1, 2012 at 4:46 PM, Joey Echeverria <joey@cloudera.com> wrote:
> 
>> You only have to refresh nodes if you're making use of an allows file.
>> 
>> Thanks does it mean that when tasktracker/datanode starts up it
> communicates with namenode using master file?
> 
> Sent from my iPhone
>> 
>> On Mar 1, 2012, at 18:29, Mohit Anchlia <mohitanchlia@gmail.com> wrote:
>> 
>>> Is this the right procedure to add nodes? I took some from hadoop wiki
>> FAQ:
>>> 
>>> http://wiki.apache.org/hadoop/FAQ
>>> 
>>> 1. Update conf/slave
>>> 2. on the slave nodes start datanode and tasktracker
>>> 3. hadoop balancer
>>> 
>>> Do I also need to run dfsadmin -refreshnodes?
>> 

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