What should be the ideal replication factor in Hadoop Cluster?
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What is difference between split and block in hadoop?
Can we call vms as pseudos?
What is MapFile?
How does a namenode handle the failure of the data nodes?
What is Rack Awareness in Apache Hadoop?
What is Input Split in hadoop?
How will format the HDFS ?
How a task is scheduled by a jobtracker?
What is Partioner in hadoop? Where does it run
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
Explain the difference between NameNode
How we can take Hadoop out of Safe Mode?
Can NameNode and DataNode be a commodity hardware?
Is hadoop obsolete?
what is the typical block size of an HDFS block?