rman备份可以很复杂，但学习需要由浅入深，下面是最常见的几种备份、恢复方式。
备份数据的路径与大小：
SQL> show parameter DB_RECOVERY_FILE_DEST
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string E:\oracle11g\guogang\rman_backup
db_recovery_file_dest_size big integer 10G
备份：
C:\Documents and Settings\guogang>sqlplus / as sysdba;
SQL> create tablespace rman_ts datafile 'E:\oracle11g\guogang\orcl\rman_ts.dbf' size 150M;
SQL> create user rman identified by rman
temporary tablespace TEMP02
default tablespace rman_ts
quota unlimited on rman_ts;
SQL> grant recovery_catalog_owner to rman;
C:\Documents and Settings\guogang>rman catalog rman/rman
RMAN>create catalog tablespace rman_ts;
C:\Documents and Settings\guogang>rman target rman/rman -- catalog数据库作为RMAN的资料库
C:\Documents and Settings\guogang>rman target / --控制文件作为RMAN的资料库
RMAN> backup database;
RMAN> list backupset;
RMAN> backup tablespace USERS;
RMAN> backup datafile 4;
恢复：
SQL> shutdown immediate;
SQL> startup mount;
SQL> alter database open;
C:\Documents and Settings\guogang>rman target /
RMAN> restore database;--恢复整个数据库
RMAN> recover database;
RMAN> restore tablespace USERS;--恢复表空间
RMAN> recover tablespace USERS;
RMAN> restore datafile 4;--恢复数据文件
RMAN> recover datafile 4;
注意的是：在10.2.0.1.0上，建资料库报错，在google上查，是bug，需要升级到10.2.0.4.0 。