Cloudera
CCA-500 · Question #21
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.
The correct answer is B. You must modify the configuration files on each of the six SataNodes machines E. You must restart all six DatNode daemon to apply the changes to the cluster. Manager-Managing-Clusters/cmmc_mod_configs.html
Configuration
Question
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.
Options
- AYou must modify the configuration files on the NameNode only.
- BYou must modify the configuration files on each of the six SataNodes machines
- CYou don't need to restart any daemon, as they will pick up changes automatically
- DYou must restart the NameNode daemon to apply the changes to the cluster
- EYou must restart all six DatNode daemon to apply the changes to the cluster
How the community answered
(56 responses)- A4% (2)
- B75% (42)
- C7% (4)
- D14% (8)
Explanation
Manager-Managing-Clusters/cmmc_mod_configs.html
Topics
#DataNode configuration#daemon restart#configuration propagation#cluster management
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