数据库热备
①　启动数据库服务
[root@localhost ~]$ su dmdba
[root@localhost ~]$ cd /dm8/bin
[dmdba@localhost bin]$ ./DmServiceDMSVR01 start

②　 开启归档模式
[dmdba@localhost bin]$ ./disql SYSDBA/DM01SYDBA@LOCALHOST:5236
disql V8
SQL> alter database mount;
SQL> alter database add archivelog 'type=local,dest=/dm8/arch,file_size=80,space_limit=0';
SQL> alter database archivelog;
SQL> alter database open;
SQL> exit

③　执行热备
[dmdba@localhost bin]$ ./disql SYSDBA/DM01SYDBA@LOCALHOST:5236
SQL> backup database full backupset '/dm8/backup';
SQL> exit

数据库还原
①　关闭数据库服务
[dmdba@localhost ~]$ cd /dm8/bin
[dmdba@localhost bin]$ ./DmServiceDMSERVER stop

②　检查备份集是否可用
[dmdba@localhost bin]$ ./dmrman
RMAN> check backupset '/dm8/backup';

③　还原、恢复、更新
[dmdba@localhost bin]$ ./dmrman
dmrman V8
RMAN> restore database '/dm8/data/DAMENG/dm.ini' from backupset '/dm8/backup';
RMAN> recover database '/dm8/data/DAMENG/dm.ini' with archivedir '/dm8/arch';
RMAN> recover database '/dm8/data/DAMENG/dm.ini' update db_magic ;

④　重启数据库服务
[dmdba@localhost ~]$ cd /dm8/bin
[dmdba@localhost bin]$ ./DmServiceDMSERVER start