Answer / Dharmendra Singh Rathor

High availability of a namenode refers to its ability to remain operational and provide consistent services even in the event of failures or maintenance. In HDFS, this is achieved through techniques like active-standby configuration, where one namenode acts as the primary (active) while another serves as a secondary backup (standby). If the active fails, the standby takes over without any service interruption.

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

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Explain HDFS “Write once Read many” pattern?

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Does the HDFS go wrong? If so, how?

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How can one set space quota in Hadoop (HDFS) directory?

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How to change the replication factor of data which is already stored in HDFS?

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What is Hadoop Distributed File System- HDFS?

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What is active and passive NameNode in HDFS?

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What do you mean by the high availability of a namenode?

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What do you mean by meta data in hdfs? List the files associated with metadata.

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