What does the command mapred.job.tracker do?
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Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What are the functionalities of jobtracker?
What is speculative execution in Hadoop?
Explain what if rack 2 and datanode fails?
What is a Combiner?
What is Hadoop?
What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
How hdfa differs with nfs?
What are the modes in which Apache Hadoop run?
What are the network requirements for using hadoop?
Why do we need a password-less ssh in fully distributed environment?