Does google use hadoop?
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How many JVMs run on a slave node?
What is the jobtracker and what it performs in a hadoop cluster?
Is hadoop a memory?
What are the hadoop's three configuration files?
How to keep HDFS cluster balanced?
What is nlineoutputformat?
What is the purpose of button groups?
What do the master class and the output class do?
Explain the use of .mecia class?
Does the hdfs client decide the input split or namenode?
Can you explain how do ‘map’ and ‘reduce’ work?
Why password is needed in ssh localhost?
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