What is the primary function of the NameNode in Hadoop's architecture?

  • Data Storage
  • Fault Tolerance
  • Job Execution
  • Metadata Management
The NameNode in Hadoop is responsible for metadata management, storing information about the location and health of data blocks. It doesn't store the actual data but keeps track of where data is stored across the cluster. This metadata is crucial for the proper functioning of the Hadoop Distributed File System (HDFS).
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