CCA-500 · Question #32
You have A 20 node Hadoop cluster, with 18 slave nodes and 2 master nodes running HDFS High Availability (HA). You want to minimize the chance of data loss in your cluster. What should you do?
The correct answer is B. Set an HDFS replication factor that provides data redundancy, protecting against node failure. I think B is the only answer that makes any sense. Read the question carefully, because you can have HA without setting the proper data replication factor. And data replication is directly related to potential data loss. Having a ResourceManager only relates to YARN…
Question
You have A 20 node Hadoop cluster, with 18 slave nodes and 2 master nodes running HDFS High Availability (HA). You want to minimize the chance of data loss in your cluster. What should you do?
Options
- AAdd another master node to increase the number of nodes running the JournalNode which
- BSet an HDFS replication factor that provides data redundancy, protecting against node failure
- CRun a Secondary NameNode on a different master from the NameNode in order to provide
- DRun the ResourceManager on a different master from the NameNode in order to load-share
- EConfigure the cluster's disk drives with an appropriate fault tolerant RAID level
How the community answered
(29 responses)- A3% (1)
- B83% (24)
- C10% (3)
- E3% (1)
Explanation
I think B is the only answer that makes any sense. Read the question carefully, because you can have HA without setting the proper data replication factor. And data replication is directly related to potential data loss. Having a ResourceManager only relates to YARN functionality and is required for HA anyway.
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