Explain what is jobtracker in hadoop? What are the actions followed by hadoop?
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What is winutils hadoop?
Explain what is hadoop?
For using hadoop list the network requirements?
Why does one remove or add nodes in a Hadoop cluster frequently?
What is the basic difference between traditional RDBMS and Hadoop?
What are the core components of Hadoop?
Is hadoop still in demand?
Which port does SSH work on?
What is the difference between TextInputFormat and KeyValueInputFormat class?
What are the port numbers of task tracker?
What are the network requirements for hadoop?
Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?
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