Define a datanode?
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How the HDFS Blocks are replicated?
What if a namenode has no data?
What is the function of NodeManager?
Which files are used by the startup and shutdown commands?
What infrastructure do we need to process 100 TB data using Hadoop?
Explain the master class and the output class do?
On what basis Namenode will decide which datanode to write on?
What is the InputFormat ?
What is rack-aware replica placement policy?
What are the additional benefits YARN brings in to Hadoop?
What is structured data?
what are the steps involved in decommissioning removing
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