A.If the end of the data block has been reached, then close the connection to the DataNode, and then search for the next data block again until all the data is read

B.After obtaining this input stream, the client calls the read method to read the data. The input stream selects the nearest DataNode to establish a connection and read data

C.Obtain the storage location of the data block corresponding to this file in NameNode by calling NameNode remotely through RPC

D.The client calls close to close the input stream

E.The client calls the open method of the FileSystem instance to obtain the input stream corresponding to the file

A.Miner

B.Manager

C.Farmer

D.HD

E.Libra

A.The client divides the file into multiple blocks, and writes them to each DataNode in sequence according to the address information of the DataNode

B.The file data of the client is passed to the DataNode through the NameNode

C.The client writes the entire file to each DataNode in sequence according to the address information of the DataNode, and then the DataNode divides the file into multiple blocks

D.The client only uploads data to one DataNode, and then the NameNode is responsible for block replication

A.Iterative calculation

B.Stream computing

C.Offline Computing

D.Real-time interactive computing

A.spooling directory source

B.exec source

C.syslog source

D.http source