What is the use of Combiner?
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Input Split & Record Reader and what they do?
What is HDFS - Hadoop Distributed File System?
What happens to job tracker when namenode is down?
How to come out of the insert mode?
Define a datanode?
What are sink processors?
What is Schema on Read and Schema on Write?
What is the best hardware configuration to run Hadoop?
Does Hadoop requires RAID?
How you can contact your client everyday ?
What is the meaning of the term "non-DFS used" in Hadoop web-console?
What is Rack Awareness in Apache Hadoop?
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