oracle控制文件恢复测试演练

最新推荐文章于 2021-04-15 07:30:32 发布

原创最新推荐文章于 2021-04-15 07:30:32 发布 · 293 阅读

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#学习记录

本文记录了一次Oracle数据库控制文件丢失后的修复过程。包括使用剩余控制文件进行复制替换、强制关闭数据库、重新挂载及打开数据库等步骤。

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SQL> select name from v$controlfile;

NAME
--------------------------------------------------------------------------------
/u01/oracle/oradata/orcl/control01.ctl
/u01/oracle/fast_recovery_area/orcl/control02.ctl

SQL> ho rm /u01/oracle/oradata/orcl/control01.ctl

SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@com ~]$ rman target /

Recovery Manager: Release 11.2.0.4.0 - Production on Sat Jan 6 08:58:33 2018

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

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00554: initialization of internal recovery manager package failed
RMAN-06003: ORACLE error from target database:
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/u01/oracle/oradata/orcl/control01.ctl'
ORA-27041: unable to open file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
[oracle@com ~]$
[oracle@com ~]$
[oracle@com ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Sat Jan 6 08:58:44 2018

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

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
--删除控制文件后关闭数据库，这样是关不掉的。
SQL> shutdown immediate;
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/u01/oracle/oradata/orcl/control01.ctl'
ORA-27041: unable to open file
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3

--用abort 强制关闭数据库
SQL> shutdown abort

ORACLE instance shut down.

--启动数据库，发现数据库无法启动，报错ORA-00205。这时候数据库处于nomount阶段。

SQL> startup
ORACLE instance started.

Total System Global Area 1553305600 bytes
Fixed Size 2253544 bytes
Variable Size 922750232 bytes
Database Buffers 620756992 bytes
Redo Buffers 7544832 bytes
ORA-00205: error in identifying control file, check alert log for more info

--查看控制文件列表
SQL> show parameter control_files;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
control_files string/u01/oracle/oradata/orcl/contr
ol01.ctl, /u01/oracle/fast_rec
overy_area/orcl/control02.ctl

--查看是否存在控制文件

SQL> ho ls /u01/oracle/oradata/orcl/control01.ctl
ls: 无法访问/u01/oracle/oradata/orcl/control01.ctl: 没有那个文件或目录

SQL> ho ls /u01/oracle/fast_recovery_area/orcl/control02.ctl
/u01/oracle/fast_recovery_area/orcl/control02.ctl

--复制存在的控制文件为刚才删除的控制文件

SQL> ho cp /u01/oracle/fast_recovery_area/orcl/control02.ctl /u01/oracle/oradata/orcl/control01.ctl

--开启数据库
SQL> alter database mount;

Database altered.

SQL> alter database open;

Database altered.