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 <[EMAIL PROTECTED]> wrote:
> On Thu, Mar 1, 2012 at 4:46 PM, Joey Echeverria <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]> wrote:
>>> Is this the right procedure to add nodes? I took some from hadoop wiki
>>> 1. Update conf/slave
>>> 2. on the slave nodes start datanode and tasktracker
>>> 3. hadoop balancer
>>> Do I also need to run dfsadmin -refreshnodes?