Hi James, You can put the same hadoop-site.xml on all machines. Yes, you do want a secondary NN - a single NN is a SPOF. Browser the archives a few days back to find an email from Paul about DRBD (disk replication) to avoid this SPOF.
Otis -- Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch ----- Original Message ---- > From: James Graham (Greywolf) <[EMAIL PROTECTED]> > To: core-user@hadoop.apache.org > Sent: Wednesday, August 6, 2008 1:37:20 PM > Subject: Configuration: I need help. > > Seeing as there is no search function on the archives, I'm relegated > to asking a possibly redundant question or four: > > I have, as a sample setup: > > idx1-tracker JobTracker > idx2-namenode NameNode > idx3-slave DataTracker > ... > idx20-slave DataTracker > > Q1: Can I put the same hadoop-site.xml file on all machines or do I need > to configure each machine separately? > > Q2: My current setup does not seem to find a primary namenode, but instead > wants to put idx1 and idx2 as secondary namenodes; as a result, I am > not getting anything usable on any of the web addresses (50030, > 50050, > 50070, 50090). > > Q3: Possibly connected to Q1: The current setup seems to go out and start > on all machines (masters/slaves); when I say "bin/start-mapred.sh" on > the JobTracker, I get the answer "jobtracker running...kill it > first". > > Q4: Do I even *need* a secondary namenode? > > IWBN if I did not have to maintain three separate configuration files > (jobtracker/namenode/datatracker). > -- > James Graham (Greywolf) | > 650.930.1138|925.768.4053 * > [EMAIL PROTECTED] | > Check out what people are saying about SearchMe! -- click below > http://www.searchme.com/stack/109aa
