What is rack awareness in hadoop?
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How does job tracker schedule a job for the task tracker?
Compare Apache Hadoop and Apache Spark?
What is the command to change the replication factor ?
How to create hadoop archive?
What happen if one of the datanodes has much slower cpu?
Can you define udf?
Why do the nodes are removed and added frequently in a hadoop cluster?
Ideally what should be replication factor in a Hadoop cluster?
Which directory does hadoop install to?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
How to restart NameNode or all the daemons in Hadoop?
Explain how jobtracker schedules a task?
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