Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at
their default, what do you need to do when adding a new slave node to cluster?
A.
Nothing, other than ensuring that the DNS (or/etc/hosts files on all machines) contains any
entry for the new node.
B.
Restart the NameNode and ResourceManager daemons and resubmit any running jobs.
C.
Add a new entry to /etc/nodes on the NameNode host.
D.
Restart the NameNode of dfs.number.of.nodes in hdfs-site.xml
Answer: A
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Again this question makes no sense, who will be configuring core-site.xml, yarn-site.xml, hdfs-site.xml on slave?? if you have network connectivity can you connect any host without properly configuring name node location and starting datanode, node manager daemon from slave?
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is it not that B may be the correct answer.. Any Comment??
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A – Your Data Node will not start unless you have all the necessary files setup and the software installed. It is being assumed that Software is installed and you have copied all the necessary configuration files. The correct file to modify is “/etc/includes” if you are using it.
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A
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is it not that B may be the correct answer.. Any Comment??
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A is the correct answer
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B
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