rman累积增量备份脚本

run {
allocate channel ch1 device type disk;
allocate channel ch2 device type disk;
sql'alter system switch logfile';
crosscheck archivelog all;
delete noprompt expired archivelog all;
backup as compressed backupset incremental level 1 cumulative database format '/backup/ORCL/%d_%s' include current controlfile;     
delete noprompt obsolete recovery window 7days;
release channel ch1;
release channel ch2;
}