I am new to MapReduce. I have a doubt. Does the setup & cleanup methods are executed after each map & reduce task.
Setup & cleanup methods are executed after each task, as task are executed on separate machines. If a method throws an exception, it will be skipped for that particular task.
A Zero reducer as the name suggests ...READ MORE
Differences are as follows:
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Doc on Hadoop Streaming : http://hadoop.apache.org/docs/r1.2.1/streaming.html
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