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Explain the process that overwrites the replication factors in HDFS?
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Answer Posted / Mukesh Kumar Chaudhary
In HDFS, you can change the replication factor for a file by using the 'dfs.datanode.update.upgrade-failed-blocks' and 'dfs.client.block.write.replace' configuration properties. When you increase the replication factor, the NameNode schedules new replicas to be created on other DataNodes; when you decrease it, existing replicas are deleted according to the deletion policy.
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