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.
A.
You must modify the configuration file on each of the six DataNode machines.
B.
You must restart the NameNode daemon to apply the changes to the cluster
C.
You must restart all six DatNode daemon to apply the changes to the cluste
D.
You don’t need to restart any daemon, as they will pick up changes automatically
E.
You must modify the configuration files on the NameNode only. DataNodes read their
configuration from the master nodes.
A and C
DataNode configuration files are “local” – nothing to do with NameNode and vice versa. Hence, make the changes and restart them.
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I choose BE
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