多项选择题
IdentifythechannelsettingsthatcanbeperformedusingtheCONFIGURECHANNELorALLOCATECHANNELcommandsinRMAN?()
A.Limitingtheinput/output(I/O)bandwidthconsumption
B.Specifyingthesizeofbackupsetsandbackuppieces
C.Specifyingvendor-specificinformationforamediamanager
D.Specifyingtheparallelismforbackupandrestoreoperations