主库：备份控制文件；定期清理归档日志；
RHEL平台
主库脚本：
1. RMAN设置：
RMAN>configure controlfile autobackup on;
RMAN>configure retention policy to recovery window of 3 days;
RMAN>configure controlfile autobackup on;
RMAN>configure retention policy to recovery window of 3 days;
2. 在系统删除3天前的归档日志
find . -mtime +3 -exec rm -rf {} \;
find . -mtime +3 -exec rm -rf {} \;
export ORACLE_SID=orcl10g
$ORACLE_HOME/bin/rman <<EOF
connect target /
backup current controlfile;
delete noprompt obsolete;
connect target /
backup current controlfile;
delete noprompt obsolete;
备库脚本：
export ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1
export ORACLE_SID=orcl10g
$ORACLE_HOME/bin/rman <<EOF
connect target /
backup as compressed backupset database plus archivelog delete input;
delete noprompt obsolete;
exit;
EOF
connect target /
backup as compressed backupset database plus archivelog delete input;
delete noprompt obsolete;
exit;
EOF
crontab设置：每天四点执行
0 4 * * * 程序存放路径 2>/dev/null
