Examine the RMAN command:
RMAN> RUN {
ALLOCATE CHANNEL c1 DEVICE TYPE sbt;
ALLOCATE CHANNEL c2 DEVICE TYPE sbt;
ALLOCATE CHANNEL c3 DEVICE TYPE sbt;
BACKUP
INCREMENTAL LEVEL = 0
(DATAFILE 145 CHANNEL c1)
(DATAFILE 239 CHANNEL c2)
(DATAFILE 678 CHANNEL c3);
SQL 'ALTER SYSTEM ARCHIVE LOG CURRENT';
}
Which statement is true about the command?
A.It uses multisection backup. B.It uses parallelization for the backup set. C.It uses asynchronous I/O for the backup. D.It creates compressed backup sets.正确答案B
