What is a task instance in hadoop? Where does it run?
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Can the balancer be run while Hadoop is in use?
how is a file of the size 1 GB uncompressed
How can I restart namenode?
What are the different methods to run Spark over Apache Hadoop?
What are combiners and its purpose?
What's the best way to copy files between HDFS clusters?
How a task is scheduled by a jobtracker?
Knox and Hadoop Development Tools?
What do you know by storage and compute node?
Can you explain how do ‘map’ and ‘reduce’ work?
Input Split & Record Reader and what they do?
What do the master class and the output class do?
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