Can you explain edge nodes in hadoop?
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How can one check whether NameNode is working or not?
What is namenode?
Is it possible to have hadoop job output in multiple directories?
What is the difference between TextinputFormat and KeyValueTextInputFormat class?
What does the mapred.job.tracker command do?
Can you explain record reader?
Are job tracker and task trackers present in separate machines?
Is it possible to provide multiple input to Hadoop? If yes then how?
What are the actions followed by hadoop?
What is fsck?
What do you mean by the NameNode High Availability in hadoop?
What are the common types of NOSQL data bases ?
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