Cloudera
CCA-410 · Question #16
Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?
The correct answer is D. No new can be added to the cluster until you specify them in the dfs.hosts file. See the full explanation below for the reasoning.
Question
Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?
Options
- AThe NameNode will update dfs.hosts property to include machines running the DataNode daemon on
- BAny machine running the DataNode daemon can immediately join the cluster.
- CPresented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts
- DNo new can be added to the cluster until you specify them in the dfs.hosts file.
How the community answered
(56 responses)- A5% (3)
- B7% (4)
- C14% (8)
- D73% (41)
Community Discussion
No community discussion yet for this question.