What is a task instance in hadoop? Where does it run?
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What is crontab? Explain with suitable example?
What is IdentityMapper?
Which command is used for the retrieval of the status of daemons running the hadoop cluster?
What is the difference between hadoop and other data processing tools?
Define a combiner?
what are the steps involved in commissioning adding
Rack awareness of Namenode?
What is partioner in hadoop? Where does it run,mapper or reducer?
What's the best way to copy files between HDFS clusters?
Who invented hadoop?
How do you define "block" in HDFS?
What is Partioner in hadoop? Where does it run
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