Define a datanode?
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What is Distributed Cache?
What does /var/hadoop/pids do?
Explain the difference between NameNode
What are combiners and its purpose?
shouldn't DFS be able to handle large volumes of data already?
What is Hadoop Custom partitioner ?
How we can change Replication factor when Data is on the fly?
Is secondary namenode a substitute to the namenode?
What is a Record Reader in hadoop?
What is a heartbeat in HDFS?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
Is it necessary to know java to learn hadoop?
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