oracle 12c rman备份pdb

12c oracle 数据库备份pdb 如下命令
rman target /
run{
allocate channel C1 device type disk;
allocate channel C2 device type disk;
allocate channel C3 device type disk;
allocate channel C4 device type disk;
backup as compressed backupset pluggable database CNTJS include current controlfile format '/zhjs_bakup/full_%U.bak';
release  channel C1 ;
release  channel C2 ;
release  channel C3 ;
release  channel C4 ;
}


rman>delete backup of backup;
rman>delete noprompt backupset 19;