1.

The ___________ machine is a single point of failure for an HDFS cluster.(a) DataNode(b) NameNode(c) ActionNode(d) All of the mentionedThis question was posed to me in an interview.My question is taken from Data Integrity topic in division Hadoop I/O of Hadoop

Answer»

The CORRECT option is (B) NameNode

Explanation: If the NameNode machine fails, manual intervention is necessary. Currently, automatic RESTART and failover of the NameNode software to ANOTHER machine is not SUPPORTED.



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