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In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
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Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What happens when the node running the map task fails before the map output has been sent to the reducer?
mapper or reducer?
What is the relationship between Job and Task in Hadoop?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
How does MapReduce framework view its input internally?
how JobTracker schedules a task ?
Write a Mapreduce Program for Character Count ?
what is a Task Tracker in Hadoop?
How can we assure that the values regarding a particular key goes to the same reducer?
What does a 'MapReduce Partitioner' do?
What do you mean by inputformat?
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