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courses:mapreduce-tutorial:managing-a-hadoop-cluster [2012/02/05 19:59]
straka 		courses:mapreduce-tutorial:managing-a-hadoop-cluster [2013/02/08 15:25] (current)
popel
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 A Hadoop cluster can be created: A Hadoop cluster can be created:
   * for a specific Hadoop job. This is done by executing the job with the ''-c'' option, see [[.:Running jobs]].   * for a specific Hadoop job. This is done by executing the job with the ''-c'' option, see [[.:Running jobs]].
-  * manually using ''/net/projects/hadoop/bin/hadoop-cluster'' script: <code>/net/projects/hadoop/bin/hadoop-cluster -c number_of_machines -w seconds_until_cluster_terminates</code>+  * manually using ''/net/projects/hadoop/bin/hadoop-cluster'' script: <code>/net/projects/hadoop/bin/hadoop-cluster -c number_of_machines -w seconds_to_wait_after_all_jobs_completed</code>
  
 When a Hadoop cluster is about to start, a job is submitted to SGE cluster. When the cluster starts successfully, the jobtracker:port and the address of the web interface is printed, and 3 files are created in the current directory: When a Hadoop cluster is about to start, a job is submitted to SGE cluster. When the cluster starts successfully, the jobtracker:port and the address of the web interface is printed, and 3 files are created in the current directory:
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 A Hadoop cluster is stopped: A Hadoop cluster is stopped:
-  * after the timeout specified by ''-w''+  * after the timeout specified by ''-w'' after the last task is finished
   * when the ''HadoopCluster.c$SGE_JOBID'' file is deleted   * when the ''HadoopCluster.c$SGE_JOBID'' file is deleted
   * using ''qdel''.   * using ''qdel''.

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