Can the balancer be run while Hadoop is in use?
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Explain the basic architecture of Hadoop?
How blocks are distributed among all data nodes for a particular chunk of data?
What is Hadoop streaming?
How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?
Explain what is the purpose of RecordReader in Hadoop?
Name some companies that use Hadoop?
What are the core components of Apache Hadoop?
What is the communication channel between client and namenode/datanode?
What do masters consist of?
What is nlineoutputformat?
What is a Secondary Namenode? Is it a substitute to the Namenode?
What is Writable & WritableComparable interface?
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