what are the nodes in the Hadoop cluster?
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What is the relation between job and task in hadoop?
explain Metadata in Namenode?
Explain how can we change the split size if our commodity hardware has less storage space?
Who is a 'user' in HDFS?
Explain a simple Map/Reduce problem.
What is the difference between HDFS and NAS ?
Which data storage components are used by hadoop?
Which one is default InputFormat in Hadoop ?
What is oozie in hadoop?
Is hadoop obsolete?
Which are the two types of 'writes' in HDFS?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?