How to enable/configure the compression of map output data in hadoop?
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Explain the hadoop-core configuration?
What is a secondary namenode?
What does /etc /init.d do?
What are the port numbers of namenode, job tracker and task tracker?
What is cloudera and why it is used?
What will be the consideration while we do Hardware Planning for Master in Hadoop architecture?
What is the heartbeat used for?
What is IdentityMapper?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
What is small file problem in hadoop?
What happens to job tracker when namenode is down?
What exactly is hadoop?
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