Edge nodes in Hadoop

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I know about namenodes and datanodes in Hadoop. In a recent interview I was asked about edge nodes and I did not know. What are edge nodes?
Feb 18 in Big Data Hadoop by John
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1 answer to this question.

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Namenodes and Datanodes are a part of hadoop cluster. Suppose you have a hadoop cluster and an external network and you want to connect these two, then you will use edge nodes. Edge nodes are the interface between hadoop cluster and the external network.

answered Feb 18 by Siri

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