Jun 8, 2020 in HDFS
Q:

What do you mean by the High Availability of a NameNode? How is it achieved?

1 Answer

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Jun 8, 2020

NameNode used to be single point of failure in Hadoop 1.x where the whole Hadoop cluster becomes unavailable as soon as NameNode is down. In other words, High Availability of the NameNode talks about the very necessity of a NameNode to be active for serving the requests of Hadoop clients.

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