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courses:mapreduce-tutorial:step-28 [2012/01/28 21:42]
straka 		courses:mapreduce-tutorial:step-28 [2012/01/29 16:34]
straka
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-====== MapReduce Tutorial : Custom input formats ======+====== MapReduce Tutorial : Running multiple Hadoop jobs in one class ====== 
 + 
 +The Java API offers possibility to submit multiple Hadoop job in one class. A job can be submitted either using 
 +  * [[http://hadoop.apache.org/common/docs/r1.0.0/api/org/apache/hadoop/mapreduce/Job.html#waitForCompletion(boolean)|job.waitForCompletion]] -- the job is submitted and the method waits for it to finish (successfully or not). 
 +  * [[http://hadoop.apache.org/common/docs/r1.0.0/api/org/apache/hadoop/mapreduce/Job.html#submit()|job.submit]] -- the job is submitted and the method immediately returns. In this case, the state of the submitted job can be accessed using [[http://hadoop.apache.org/common/docs/r1.0.0/api/org/apache/hadoop/mapreduce/Job.html#isComplete()|job.isComplete]] and [[http://hadoop.apache.org/common/docs/r1.0.0/api/org/apache/hadoop/mapreduce/Job.html#isSuccessful()|job.isSuccessful]] 
  
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