What are sink processors?
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What is the heartbeat used for?
What is the communication channel between client and namenode/datanode?
Whats is distributed cache in hadoop?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
What is DistributedCache and its purpose?
Who invented hadoop?
What is a secondary namenode?
How to enable trash/recycle bin in hadoop?
What is Apache Hadoop YARN?
What is Apache Hadoop?
Where do you specify the Mapper Implementation?
Are Namenode and job tracker on the same host?
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