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What is a NameNode? How many instances of NameNode run on a Hadoop Cluster?

User AquilaX
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Final answer:

A NameNode is a critical component of the Hadoop Distributed File System (HDFS) that manages the file system namespace and regulates access to files. Typically, there is one active NameNode in a Hadoop Cluster, but a standby NameNode can be configured for high availability and fault tolerance.

Step-by-step explanation:

NameNode

A NameNode is a critical component of the Hadoop Distributed File System (HDFS). It serves as the master node that manages the file system namespace and regulates access to files by clients.

In a Hadoop Cluster, there is typically only one active NameNode running at any given time. However, for high availability and fault tolerance, a standby NameNode can be configured to take over in case of failure.

User Frodik
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