oracle 11.2.0.4 rac 恢复到单实例

一、备份原库

run{
backup database format '/home/oracle/backup/db_%U_%T.bak';
backup current controlfile format '/home/oracle/backup/ctl_%U_%T.bak';
backup spfile format '/home/oracle/backup/spfile_%U_%T.bak';
backup archivelog from time 'sysdate -1' format  '/home/oracle/backup/arch_%U_%T.bak';
}	

二、修改单实例的参数文件

将备份的文件拷贝到单实例的相同目录

db_name=suq
log_archive_dest_1='location=/arch'
pga_aggregate_target=400000000
sga_target=800000000
control_files='/oradata/control.ctl'

启动单实例到nomount

[oracle@11g1 dbs]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Fri Dec 12 20:39:56 2014

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> 
SQL> startup nomount
ORACLE instance started.

Total System Global Area  797523968 bytes
Fixed Size		    2257472 bytes
Variable Size		  222301632 bytes
Database Buffers	  566231040 bytes
Redo Buffers		    6733824 bytes

三、恢复控制文件

[oracle@11g1 ~]$ rman target /

Recovery Manager: Release 11.2.0.4.0 - Production on Fri Dec 12 20:40:14 2014

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

connected to target database: SUQ (not mounted)

RMAN> restore controlfile from '/home/oracle/backup/clt_0dpq0ka5_1_1_20141212.bak';

Starting restore at 12-DEC-14
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=171 device type=DISK

channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/oradata/control.ctl
Finished restore at 12-DEC-14

RMAN> 



SQL> startup mount
ORACLE instance started.

Total System Global Area  797523968 bytes
Fixed Size		    2257472 bytes
Variable Size		  222301632 bytes
Database Buffers	  566231040 bytes
Redo Buffers		    6733824 bytes
ORA-00201: control file version 11.2.0.4.0 incompatible with ORACLE version
11.2.0.0.0
ORA-00202: control file: '/oradata/control.ctl'

这里一个报错，需要在pfile中添加版本的参数

compatible='11.2.0.4.0'

SQL> startup mount
ORACLE instance started.

Total System Global Area  797523968 bytes
Fixed Size		    2257472 bytes
Variable Size		  222301632 bytes
Database Buffers	  566231040 bytes
Redo Buffers		    6733824 bytes
Database mounted.
SQL> exit

四、修改日志文件的路径

alter database rename file '+BACKUP/suq/onlinelog/group_1.258.850940549' to '/oradata/group_1.258.850940549';
alter database rename file '+BACKUP/suq/onlinelog/group_1.259.850940549' to '/oradata/group_1.259.850940549';
alter database rename file '+BACKUP/suq/onlinelog/group_2.260.850940551' to '/oradata/group_2.260.850940551';
alter database rename file '+BACKUP/suq/onlinelog/group_2.261.850940551' to '/oradata/group_2.261.850940551';
alter database rename file '+BACKUP/suq/onlinelog/group_3.268.850941051' to '/oradata/group_3.268.850941051';
alter database rename file '+BACKUP/suq/onlinelog/group_3.269.850941053' to '/oradata/group_3.269.850941053';
alter database rename file '+BACKUP/suq/onlinelog/group_4.270.850941053' to '/oradata/group_4.270.850941053';

Database altered.

SQL> 
Database altered.

SQL> 
Database altered.

SQL> 
Database altered.

SQL> 
Database altered.

SQL> 
Database altered.

SQL> 
Database altered.

SQL> alter database rename file '+BACKUP/suq/onlinelog/group_4.271.850941053' to '/oradata/group_4.271.850941053';

Database altered.

五、还原数据文件，需要指定scn号，可以list backup查看，需要写到你能恢复到的那个时间点

run{
set newname for database to '/oradata/%b';
set until scn 394762;
restore database;
switch datafile all;
}

executing command: SET NEWNAME

Starting restore at 12-DEC-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=170 device type=DISK

channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00001 to /oradata/system.262.850940553
channel ORA_DISK_1: restoring datafile 00002 to /oradata/sysaux.263.850940565
channel ORA_DISK_1: restoring datafile 00003 to /oradata/undotbs1.264.850940573
channel ORA_DISK_1: restoring datafile 00004 to /oradata/undotbs2.266.850940597
channel ORA_DISK_1: restoring datafile 00005 to /oradata/users.267.853590391
channel ORA_DISK_1: reading from backup piece /home/oracle/backup/db_0bpq0k84_1_1_20141212.bak
channel ORA_DISK_1: piece handle=/home/oracle/backup/db_0bpq0k84_1_1_20141212.bak tag=TAG20141212T194156
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:00:35
Finished restore at 12-DEC-14

datafile 1 switched to datafile copy
input datafile copy RECID=6 STAMP=866148453 file name=/oradata/system.262.850940553
datafile 2 switched to datafile copy
input datafile copy RECID=7 STAMP=866148453 file name=/oradata/sysaux.263.850940565
datafile 3 switched to datafile copy
input datafile copy RECID=8 STAMP=866148453 file name=/oradata/undotbs1.264.850940573
datafile 4 switched to datafile copy
input datafile copy RECID=9 STAMP=866148453 file name=/oradata/undotbs2.266.850940597
datafile 5 switched to datafile copy
input datafile copy RECID=10 STAMP=866148453 file name=/oradata/users.267.853590391

RMAN> 



[oracle@11g1 oradata]$ ls -l
total 1765776
-rw-r----- 1 oracle oinstall  18497536 Dec 12 20:48 control.ctl
-rw-r----- 1 oracle oinstall 629153792 Dec 12 20:47 sysaux.263.850940565
-rw-r----- 1 oracle oinstall 734011392 Dec 12 20:47 system.262.850940553
-rw-r----- 1 oracle oinstall 209723392 Dec 12 20:47 undotbs1.264.850940573
-rw-r----- 1 oracle oinstall 209723392 Dec 12 20:47 undotbs2.266.850940597
-rw-r----- 1 oracle oinstall   5251072 Dec 12 20:46 users.267.853590391
[oracle@11g1 oradata]$ 


SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
/oradata/system.262.850940553
/oradata/sysaux.263.850940565
/oradata/undotbs1.264.850940573
/oradata/undotbs2.266.850940597
/oradata/users.267.853590391

六、打开数据库，一些后续操作

SQL> alter database open resetlogs;

Database altered.

SQL> select count(*) from test.t1;

  COUNT(*)
----------
	 2

SQL> alter database disable thread 2;

Database altered.



SQL> alter database disable thread 2;

Database altered.

SQL> 
SQL> 
SQL> 
SQL> alter database drop logfile group 3;

Database altered.

SQL> alter database drop logfile group 4;

Database altered.