What two 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. (Choose two)
A.
You must modify the configuration files on the NameNode only. DataNodes read their configuration from the master nodes
B.
You must modify the configuration files on each of the DataNodes machines
C.
You don’t need to restart any daemon, as they will pick up changes automatically
D.
You must restart the NameNode daemon to apply the changes to the cluster
E.
You must restart all six DatNode daemon to apply the changes to the cluster
Typically one machine in the cluster is designated as the NameNode and another machine the as JobTracker, exclusively. These are the masters. The rest of the machines in the cluster act as both DataNode and TaskTracker. These are the slaves
Contribute your Thoughts:
Chosen Answer:
This is a voting comment (?). You can switch to a simple comment. It is better to Upvote an existing comment if you don't have anything to add.
Submit