What is Row Key?
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Does the hdfs client decide the input split or namenode?
How to change Replication Factor For below cases ?
Explain the master class and the output class do?
What are the steps to submit a Hadoop job?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
How blocks are distributed among all data nodes for a particular chunk of data?
Who is a 'user' in HDFS?
Do we need to give a password, even if the key is added in ssh?
Explain Erasure Coding in Apache Hadoop?
Main Components of Hadoop?
What will you do when NameNode is down?
What is the problem with HDFS and streaming data like logs
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