多项选择题

IdentifythechannelsettingsthatcanbeperformedusingtheCONFIGURECHANNELorALLOCATECHANNELcommandsinRMAN?()

A.Limitingtheinput/output(I/O)bandwidthconsumption
B.Specifyingthesizeofbackupsetsandbackuppieces
C.Specifyingvendor-specificinformationforamediamanager
D.Specifyingtheparallelismforbackupandrestoreoperations
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