Explanation:A scheme might automatically move data from one DataNode to another if the free space on a DataNode falls below a certain threshold. 3. The ___________ machine is a single point of failure for an HDFS cluster.
A. DataNode
B. NameNode
C. ActionNode
D. All of the mentioned
Answer:A
Explanation:A scheme might automatically move data from one DataNode to another if the free space on a DataNode falls below a certain threshold. 3. The ___________ machine is a single point of failure for an HDFS cluster.
A. DataNode B. NameNode C. ActionNode D. All of the mentioned
Explanation:If the NameNode machine fails, manual intervention is necessary. Currently, automatic restart and failover of the NameNode software to another machine is not supported. 4. The ____________ and the EditLog are central data structures of HDFS.