Full Backup with RMAN(Recovery Manager)

run {
allocate channel c1 type disk;
allocate channel c2 type disk;
backup database tag wednesday_29_08_12 plus archivelog;
CROSSCHECK BACKUP;
CROSSCHECK archivelog all;
delete noprompt obsolete ;
delete noprompt EXPIRED BACKUP;
delete noprompt expired archivelog all;
sql ‘alter system archive log current’;
backup filesperset = 5 as COMPRESSED BACKUPSET archivelog all not backed up tag wednesday_29_08_12;
release channel c1;
release channel c2;
}