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What is the difference between namenode, backup node and checkpoint namenode?
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Answer / Rajkumar Paswan
The NameNode manages the file system namespace and metadata for an HDFS cluster. A Backup Node maintains a copy of the NameNode's metadata to ensure high availability in case of failure.nnA Checkpoint NameNode periodically takes snapshots of the NameNode's state and transfers them to the Backup Nodes, reducing the recovery time in case of a major catastrophe.
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