Examinethissyntaxwhichallocateschannelsduringaparallelimagecopy：RMAN>CONFIGUREDEVICETYPEdiskparallelism4：2>COPY3>datafile1TO‘/BACKUP/datafile1.dbf’，4>datafile2TO‘/BACKUP/datafile2.dbf’，5>datafile3TO‘/BACKUP/datafile3.dbf；RMAN>COPY2>datafile4TO‘/BACKUP/dat
题目
Examinethissyntaxwhichallocateschannelsduringaparallelimagecopy：RMAN>CONFIGUREDEVICETYPEdiskparallelism4：2>COPY3>datafile1TO‘/BACKUP/datafile1.dbf’，4>datafile2TO‘/BACKUP/datafile2.dbf’，5>datafile3TO‘/BACKUP/datafile3.dbf；RMAN>COPY2>datafile4TO‘/BACKUP/datafile4.dbf’；Howmanychannelsareused？（）
A.0
B.1
C.3
D.4
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参考答案和解析
参考答案：D