What is a secondary namenode?
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Define a commodity hardware? Does commodity hardware include ram?
What are the Basics of Hadoop?
What problems have you faced when you are working on Hadoop code?
How to enable/configure the compression of map output data in hadoop?
What is a “Distributed Cache” in Apache Hadoop?
What are the important differences between apache and hadoop?
What exactly is hadoop?
Define a daemon?
What is Apache Hadoop?
How many instances of a jobtracker run on hadoop cluster?
Is hadoop open source?
What is version-id mismatch error in hadoop?