RMAN> run { allocate channel c1 type disk; allocate channel c2 type disk; backup (datafile 1,2,3 channel c1) (archivelog all channel c2); }
RMAN> run { allocate channel c1 type disk; allocate channel c2 type disk; backup (database channel c1) (archivelog all channel c2); }
RMAN> configure device type disk parallelism 3;
RMAN> backup (datafile 1,2) (datafile 3,4) (archivelog all);
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