Whatever Joey said is correct for Cloudera's distribution. For same, I am not confident about other distribution as i haven't tried them.
Thanks, Anil On Thu, Mar 1, 2012 at 5:10 PM, Raj Vishwanathan <rajv...@yahoo.com> wrote: > The master and slave files, if I remember correctly are used to start the > correct daemons on the correct nodes from the master node. > > > Raj > > > >________________________________ > > From: Joey Echeverria <j...@cloudera.com> > >To: "common-user@hadoop.apache.org" <common-user@hadoop.apache.org> > >Cc: "common-user@hadoop.apache.org" <common-user@hadoop.apache.org> > >Sent: Thursday, March 1, 2012 4:57 PM > >Subject: Re: Adding nodes > > > >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 <mohitanch...@gmail.com> wrote: > > > >> On Thu, Mar 1, 2012 at 4:46 PM, Joey Echeverria <j...@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 <mohitanch...@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? > >>> > > > > > > > -- Thanks & Regards, Anil Gupta
