Oracle RMAN 定时备份脚本 如何从备库备份中恢复主库

##备库恢复主库controlfile方式
#HOW TO RESOTRE PRIMARY CONTROFILE FROM STANDBY CONTROFILE BACKUPSET.
#RMAN> restore PRIMARY controlfile from '<backuppiece>'

##每月1号执行
* * 1 * * su - oracle -c "sh /backup/bk_full_orcl.sh"

##脚本
#!/bin/bash
#This is rman full auto backup script
DBNAME=orcl
BACTIME=`date +%Y%m%d%I%M`
BACPATH=/backup
LGNAME='full_'$DBNAME'_'$BACTIME'.log'
export ORACLE_SID=$DBNAME
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=$ORACLE_BASE/product/19.0.0/dbhome_1
export PATH=$PATH:$ORACLE_HOME/bin
rman log="$BACPATH/$LGNAME" append <<EOF
connect target /;

　　run{
　　allocate channel c1 device type disk maxpiecesize 20g;
　　allocate channel c2 device type disk maxpiecesize 20g;
　　allocate channel c3 device type disk maxpiecesize 20g;
　　allocate channel c4 device type disk maxpiecesize 20g;
　　backup as compressed backupset database format '$BACPATH/full_%d_%T_%s_%p.bak';
　　sql 'alter system archive log current';
　　backup archivelog all format '$BACPATH/arch_%d_%T_%s_%p.bak';
　　backup current controlfile format '$BACPATH/ctl_%d_%T_%s_%p.bak';
　　release channel c1;
　　release channel c2;
　　release channel c3;
　　release channel c4;
　　}
　　crosscheck archivelog all;
　　crosscheck backupset;
　　delete noprompt obsolete;
　　delete noprompt expired backup;
　　delete noprompt archivelog all completed before 'sysdate-3';
　　delete force noprompt archivelog all completed before 'sysdate-7';
　　list backup summary;
　　exit;
　EOF