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What is a namenode in hadoop?
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Answer / Prashant Kumar Nag
The NameNode in Apache Hadoop (Hadoop Distributed File System) is the central component of the file system. It manages the file system namespace, and it is responsible for maintaining the metadata about files and directories. The NameNode keeps track of which blocks make up a file, their locations on DataNodes, permissions, replication levels, access times, and so on.
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