一、测试环境
[[email protected] ~]$ uname -a Linux localhost.localdomain 2.6.32-131.0.15.el6.x86_64 #1 SMP Tue May 10 15:42:40 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux [[email protected] ~]$ sqlplus "/as sysdba" SQL*Plus: Release 11.2.0.1.0 Production on Sun Feb 8 18:14:09 2015 Copyright (c) 1982, 2009, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options [[email protected] ~]$ rman target / Recovery Manager: Release 11.2.0.1.0 - Production on Sun Feb 8 18:14:36 2015 Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved. connected to target database: ORCL (DBID=1380300748) RMAN>
二、具体步骤
1.创建备份集
RMAN>backup as compressed backupset databse plus archivelog;
2.创建环境，(dbname保持一致)
3.将备份拷贝新环境可以访问的路径
4.启动RMAN,还原spfile 到pfile中。
（利用rman的dummy数据库名，启动到nomount状态） RMAN> restore spfile to pfile ‘/u01/app/product/11.2.0/dbhome_1/dbs/initORCL.ora‘ from ‘/u01/app/testRMAN/autobackup/2015_02_08/o1_mf_s_871152044_bfgh9f42_.bkp‘;
5.修改pfile中相关文件的路径
6.关闭数据库
7.利用该pfile重新启动数据库到nomount状态
8.restore控制文件
RMAN>restore controlfile from ‘/u01/app/testRMAN/autobackup/2015_02_08/o1_mf_s_871152044_bfgh9f42_.bkp‘;
9.修改数据库到mount状态
RMAN>alter database mount;
10.至此就可以读出数据文件的具体位置
(1) 查看数据文件及编号
$ sqlplus / as sysdba;
select file#,name from v$datafile;
(2) 查看联机日志文件
select member from v$logfile;
(3) 查看临时文件
SQL> select name from v$tempfile
(4) 查看备份集的位置
RMAN>list backup;
11.这样的话就有两个选择
a.根据现有控制文件中的路径，在新的数据环境下创建相关目录，将备份集拷贝到对应目录，还原数据库。b.重新注册备份集，修改控制文件中各个数据文件的名称，还原数据库。
在此演示第二种情况：
(1).恢复了控制文件之后将备份集注册到控制文件
RMAN>catalog start with ‘/u01/app/testRMAN/‘;
(2)恢复数据文件
RMAN> RUN {
SET NEWNAME FOR DATAFILE 1 to ‘/u01/app/oracle/oradata/orcl/system01.dbf‘;
SET NEWNAME FOR DATAFILE 2 to ‘/u01/app/oracle/oradata/orcl/undotbs1.dbf‘;
SET NEWNAME FOR DATAFILE 3 to ‘/u01/app/oracle/oradata/orcl/sysaux01.dbf‘;
SET NEWNAME FOR DATAFILE 4 to ‘/u01/app/oracle/oradata/orcl/users01.dbf‘;
SET NEWNAME FOR DATAFILE 5 to ‘/u01/app/oracle/oradata/orcl/undotbs2.dbf‘;
RESTORE DATABASE;
SWITCH DATAFILE ALL;
};
(3)修改联机日志文件的路径
# su - oracle
$ sqlplus / as sysdba;
SQL> alter database rename file ‘/u01/app/oracle/redo101.log‘ to ‘/u01/app/oracle/oradata/orcl/redo101.log‘
(4)尽量恢复数据 recover database until cancel; 注：如果数据库仍然出现SCN不一致的情况，在参数文件中添加隐含参数_allow_resetlogs_corruption=true启动数据库，这时候可以expdp出需要的数据。
时间： 2024-10-09 20:38:35