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What processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes…

What processes must you do if you are running a Hadoop cluster with a single NameNode
and six DataNodes, and you want to change a configuration parameter so that it affects all
six DataNodes.

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A.
You must modify the configuration files on the NameNode only. DataNodes read their
configuration from the master nodes.

B.
You don’t need to restart any daemon, as they will pick up changes automatically

C.
You must restart all six DatNode daemon to apply the changes to the cluste

D.
You must modify the configuration file on each of the six DataNode machines.

E.
You must restart the NameNode daemon to apply the changes to the cluster

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