Hi, Thanks for the reply. Actually, what I am trying to ask is suppose if the jobtracker+namenode are started by user hadoop, does user "senthil" can submit the job without starting its own jobtracker+namenode.
The test Hadoop cluster I setup is, using individual Redhat Linux machines. So for the user hadoop I need to copy the SSH key to all the machines, so that user hadoop can ssh to all the nodes without password. Do I need to do this (generating SSH key and copying to all the node) for all the users who are going to use Hadoop and MapReduce. Thanks, Senthil -----Original Message----- From: Khalil Honsali [mailto:[EMAIL PROTECTED] Sent: Saturday, January 12, 2008 7:01 PM To: hadoop-user@lucene.apache.org Subject: Re: Hadoop Job Submission Hi, once you have started the jobtracker+namenode on your cluster, you can launch a job from any node of the cluster. AFAIK, to submit multiple jobs you need to do that yourself either: - by writing a bash script to launch several jobs.jar one after the other - by bundling several jobs in a single job.jar (calling API:: JobClient.runjob( job ) repeatdly for each job in jobs ), for this you have to create a new instance of JobClient for each job. On 12/01/2008, Natarajan, Senthil <[EMAIL PROTECTED]> wrote: > > Hi, > I have some basic questions in Hadoop Job submission. Could you please let > me know. > > > 1) Once Hadoop daemons (dfs, JobTracker etc...) are started by hadoop > user. > > 2) Can any user submit job to Hadoop. > > 3) Or does each user has to start the Hadoop daemons and submit job. > > 4) Is there any queue available, like condor, to submit multiple > jobs. > > Thanks, > Senthil >
