1. 脚本如下
说明：按照客户要求，在主备数据库上同时部署脚本，自动判断是否是主库，如果是主库则进行备份，备库不需要备份，记录日志为备份库即可，以下脚本仅供参考，可以进一步优化。
脚本说明：
1、DATABASE_ROLE查看主备库角色变量
2、Main()函数 数据库备份脚本
3、根据主备库关键字判断是否执行main()函数
#!/bin/bash
# Author:roidba
# filename:/backup/backup.sh
#logfile:/backup/rman_fullbackup.log
ORACLE_SID=orcl; export ORACLE_SID
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1; export ORACLE_HOME
PATH=.:${JAVA_HOME}/bin:${PATH}:$HOME/bin:$ORACLE_HOME/bin
####variables###
DATABASE_ROLE=`sqlplus -silent "/as sysdba" <<EOF
SET PAGESIZE 0 FEEDBACK OFF VERIFY OFF HEADING OFF ECHO OFF
select DATABASE_ROLE from v\\\$database;
EXIT;
EOF`
###function###
main()
{
($ORACLE_HOME/bin/rman <<EOF
connect target /
run {
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE BACKUP OPTIMIZATION ON;
allocate channel d1 type disk;
allocate channel d2 type disk;
backup as compressed backupset database format '/backup/fulldbbakcup_%s_%p_%t.rmn' tag='fulldbbackup' include current controlfile;
backup as compressed backupset archivelog all format '/backup/backup_archive_%s_%p_%t.arc';
release channel d1;
release channel d2;
crosscheck backup;
delete noprompt expired backup;
delete noprompt archivelog until time 'sysdate - 3' backed up 1 times to device type disk;
delete noprompt backupset of archivelog until time 'sysdate - 3' ;
delete noprompt backupset of database completed before 'sysdate - 3';
}
exit;
EOF
)
}
###if-then-else###
if [ "$DATABASE_ROLE" = "PRIMARY" ];
then
main
echo "***database role is primary*** " >>/backup/rman_fullbackup.log
else
echo "database role is standby"
fi
2. 自动备份，使用crontab调度
sh /backup/rman_backup.sh >>/backup/rman_fullbackup.log &
crontab -e
07 20 * * * sh /backup/rman_backup.sh >>/backup/rman_fullbackup.log &
3. 理解crontab格式
<roidb01:orcl:/backup>$more /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root
HOME=/
# For details see man 4 crontabs
# Example of job definition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * user-name command to be executed
<roidb01:orcl:/backup>$
原文地址：http://blog.51cto.com/roidba/2119684