RMAN - "丢失控制文件的恢复"
OS:
Oracle Linux Server release 5.7
DB：
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
1.
如何获取数据库的DBID
由于DBID在控制文件和数据文件都存在记录，所以如果能够mount数据库就可以查询v$database视图获得
SQL> select dbid from v$database;
DBID
----------
675362528
SQL>
2.
在nomount状态时
[root@yoon ~]# cd /u01/archivelog/
[root@yoon archivelog]# ls -lr
total 19872
-rw-r----- 1 oracle oinstall 10158080 Sep 15 12:47 c-675362528-20130915-01
-rw-r----- 1 oracle oinstall 10158080 Sep 11 16:20 c-675362528-20130911-01
[root@yoon archivelog]#
这里的675362528就是DBID
3.
连接到RMAN
[oracle@yoon ~]$ rman target /
Recovery Manager: Release 11.2.0.3.0 - Production on Sun Sep 15 12:56:09 2013
Copyright (c) 1982, 2011, Oracle and/or its affiliates.All rights reserved.
connected to target database (not started)
RMAN>
4.
关闭数据库
RMAN> shutdown immediate
database closed
database dismounted
Oracle instance shut down
RMAN>
5.delete controlfile
RMAN> host;
[oracle@yoon ~]$ cd /u01/oracle/oradata/yoon/
[oracle@yoon yoon]$ rm -rf control01.ctl
[oracle@yoon yoon]$
6.由于目标数据库控制文件丢失，在此处必须指定dbid
RMAN> startup nomount
connected to target database (not started)
Oracle instance started
Total System Global Area1653518336 bytes
Fixed Size2228904 bytes
Variable Size956304728 bytes
Database Buffers687865856 bytes
Redo Buffers7118848 bytes
RMAN>
RMAN> set dbid 675362528
executing command: SET DBID
RMAN> restore controlfile from '/u01/archivelog/c-675362528-20130915-01';
Starting restore at 15-SEP-13
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=19 device type=DISK
channel ORA_DISK_1: restoring control file
channel ORA_DISK_1: restore complete, elapsed time: 00:00:01
output file name=/u01/oracle/oradata/yoon/control01.ctl
output file name=/u01/oracle/fast_recovery_area/yoon/control02.ctl
Finished restore at 15-SEP-13
RMAN>
RMAN> sql 'alter database mount';
sql statement: alter database mount
released channel: ORA_DISK_1
RMAN>
RMAN> restore database;
Starting restore at 15-SEP-13
Starting implicit crosscheck backup at 15-SEP-13
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=19 device type=DISK
Crosschecked 1 objects
Finished implicit crosscheck backup at 15-SEP-13
Starting implicit crosscheck copy at 15-SEP-13
using channel ORA_DISK_1
Finished implicit crosscheck copy at 15-SEP-13
searching for all files in the recovery area
cataloging files...
no files cataloged
using channel ORA_DISK_1
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 /u01/oracle/oradata/yoon/system01.dbf
channel ORA_DISK_1: restoring datafile 00002 to /u01/oracle/oradata/yoon/sysaux01.dbf
channel ORA_DISK_1: restoring datafile 00003 to /u01/oracle/oradata/yoon/undotbs01.dbf
channel ORA_DISK_1: restoring datafile 00004 to /u01/oracle/oradata/yoon/users01.dbf
channel ORA_DISK_1: reading from backup piece /u01/oracle/fast_recovery_area/YOON/backupset/2013_09_15/o1_mf_nnndf_TAG20130915T124630_93bgx6qx_.bkp
channel ORA_DISK_1: piece handle=/u01/oracle/fast_recovery_area/YOON/backupset/2013_09_15/o1_mf_nnndf_TAG20130915T124630_93bgx6qx_.bkp tag=TAG20130915T124630
channel ORA_DISK_1: restored backup piece 1
channel ORA_DISK_1: restore complete, elapsed time: 00:01:05
Finished restore at 15-SEP-13
RMAN>
RMAN> recover database;
Starting recover at 15-SEP-13
using channel ORA_DISK_1
starting media recovery
archived log for thread 1 with sequence 1 is already on disk as file /u01/oracle/oradata/yoon/redo01.log
archived log file name=/u01/oracle/oradata/yoon/redo01.log thread=1 sequence=1
media recovery complete, elapsed time: 00:00:00
Finished recover at 15-SEP-13
RMAN>
RMAN> sql 'alter database open resetlogs';
sql statement: alter database open resetlogs
RMAN>
注意：because of‘resetlogs'，建议立即对数据库进行一次全备