Explain the benefits of block transfer?
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How we can change Replication factor when Data is on the fly?
How many instances of JobTracker can run on a Hadoop Cluser?
What is the default replication factor?
Define a commodity hardware? Does commodity hardware include ram?
What is the communication channel between client and namenode/datanode?
If a data Node is full how it's identified?
What is unstructured data?
Explain how do ‘map’ and ‘reduce’ works?
What is the meaning of the term "non-DFS used" in Hadoop web-console?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
What are the core components of Apache Hadoop?
What is compute and Storage nodes?
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