Is secondary namenode a substitute to the namenode?
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What is small file problem in hadoop?
what are the nodes in the Hadoop cluster?
Mention what are the data components used by Hadoop?
Define tasktracker.
What is unstructured data?
What is nlineoutputformat?
What do you know about sequencefileinputformat?
How is HDFS fault tolerant?
What is the jobtracker and what it performs in a hadoop cluster?
What are the most commonly defined input formats in Hadoop?
How to enable/configure the compression of map output data in hadoop?
How to resolve small file problem in hdfs?
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