Which of The following description on HDFS of Hadoop is correct? (Multiple choice)
A. HDFS consists of NameNode, DataNode and Client
B. Metadata on HDFS Standby NameNode is synchronized by the main NameNode
C. HDFS uses the closest rack node for the first copy store of the data
D. HDFS is suitable for read and write tasks of once write and read many times
Answer:A
Which of The following description on HDFS of Hadoop is correct? (Multiple choice)
A. HDFS consists of NameNode, DataNode and Client B. Metadata on HDFS Standby NameNode is synchronized by the main NameNode C. HDFS uses the closest rack node for the first copy store of the data D. HDFS is suitable for read and write tasks of once write and read many times