忘了从哪看到的了，一直在用，觉得还行。

/orabak/scrript 脚本所在目录

/orabak/log rman使用log目录

/orabak/md 数据文件备份目录

/orabak/ctl 控制文件备份目录

/orabak/arch 归档备份目录

备份策略：

每天凌晨2:30备份，周日0级，周四1级，其他时间2级，最多恢复7天的内的状态

rman target /

CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;

*在NOCATLOG下模式，控制文件默认保存7天的备份集信息。所以如果制定的备份策略大于7天，则需要修改初始化参数CONTROL_FILE_RECORD_KEEP_TIME，使得CONTROL_FILE_RECORD_KEEP_TIME的值不小于备份策略的天数

0级备份文件rman_level0.rcv

connect target /
run{
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/orabak/ctl/ctl_%F';
ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
ALLOCATE CHANNEL CH2 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
ALLOCATE CHANNEL CH3 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
BACKUP INCREMENTAL LEVEL 0 TAG 'level 0' DATABASE
PLUS ARCHIVELOG FORMAT '/orabak/arch/arch%T_%U' DELETE ALL INPUT ;
RELEASE CHANNEL CH1;
RELEASE CHANNEL CH2;
RELEASE CHANNEL CH3;
}
ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE DISK;
CROSSCHECK BACKUPSET;
DELETE NOPROMPT EXPIRED BACKUP;
DELETE NOPROMPT OBSOLETE ;

1级备份文件rman_level1.rcv

connect target /
run{
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/orabak/ctl/ctl_%F';
ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
ALLOCATE CHANNEL CH2 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
ALLOCATE CHANNEL CH3 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
BACKUP INCREMENTAL LEVEL 1 TAG 'level 1' DATABASE
PLUS ARCHIVELOG FORMAT '/orabak/arch/arch%T_%U' DELETE ALL INPUT ;
RELEASE CHANNEL CH1;
RELEASE CHANNEL CH2;
RELEASE CHANNEL CH3;
}
ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE DISK;
CROSSCHECK BACKUPSET;
DELETE NOPROMPT EXPIRED BACKUP;
DELETE NOPROMPT OBSOLETE ;

2级备份文件rman_level2.rcv

connect target /
run{
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '/orabak/ctl/ctl_%F';
ALLOCATE CHANNEL CH1 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
ALLOCATE CHANNEL CH2 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
ALLOCATE CHANNEL CH3 DEVICE TYPE DISK FORMAT '/orabak/md/md_%T_%U' maxpiecesize 4g;
BACKUP INCREMENTAL LEVEL 2 TAG 'level 2' DATABASE
PLUS ARCHIVELOG FORMAT '/orabak/arch/arch%T_%U' DELETE ALL INPUT ;
RELEASE CHANNEL CH1;
RELEASE CHANNEL CH2;
RELEASE CHANNEL CH3;
}
ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE DISK;
CROSSCHECK BACKUPSET;
DELETE NOPROMPT EXPIRED BACKUP;
DELETE NOPROMPT OBSOLETE ;

备份脚本文件rman_bak.sh

#!/bin/bash

RUN_USER="oracle"
rq=`date "+%Y%m%d"`
fname="*$rq*"

if [ "$LOGNAME" != "$RUN_USER" ]; then
echo "Please run this script as $RUN_USER " >> /orabak/logs/$rq.log
exit 1
fi

cd $HOME
. .bash_profile

weekname=`date +%A`

case "$weekname" in
Sunday)
echo -n "Today is $weekname,Back oracle Level 0" >> /orabak/log/oracle.log
date "+ %Y-%m-%d %T Start to backup DateBase" >> /orabak/log/oracle.log
rman cmdfile=/orabak/script/rman_level0.rcv msglog=/orabak/log/$rq.log
date "+ %Y-%m-%d %T RMAN BACKUP finished " >> /orabak/log/oracle.log
;;

Thursday)
echo -n "Today is $weekname,Back oracle Level 1" >> /orabak/log/oracle.log
date "+ %Y-%m-%d %T Start to backup DateBase" >> /orabak/log/oracle.log
rman cmdfile=/orabak/script/rman_level1.rcv msglog=/orabak/log/$rq.log
date "+ %Y-%m-%d %T RMAN BACKUP finished " >> /orabak/log/oracle.log
;;

*)
echo -n "Today is $weekname,Back oracle Level 2" >> /orabak/log/oracle.log
date "+ %Y-%m-%d %T Start to backup DateBase" >> /orabak/log/oracle.log
rman cmdfile=/orabak/script/rman_level2.rcv msglog=/orabak/log/$rq.log
date "+ %Y-%m-%d %T RMAN BACKUP finished " >> /orabak/log/oracle.log
;;

esac

使用crontab定时执行rman_bak.sh

crontab -e

添加以下内容