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What is daemon in Hadoop?

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Can anyone tell me what is daemon in Hadoop?

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In computing terms, Daemons is a process that runs in the background. Hadoop has five such daemons, namely NameNode, Secondary NameNode, DataNode, JobTracker, and TaskTracker. Each daemon runs separately in its own JVM. To know more about NameNode, Secondary NameNode and DataNode, check out this Hadoop Tutorial by Intellipaat.

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