Oracle DBA课程系列笔记（6_2）

第六章: 控制文件（2）

6）控制文件恢复

单个文件丢失：

[oracle@oracle dbs]$ rm /disk2/lx02/oradata/control03.ctl

[oracle@oracle dbs]$ sqlplus '/as sysdba'

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 1 06:14:54 2011

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to an idle instance.

06:14:54 SQL> startup

ORACLE instance started.

Total System Global Area 176160768 bytes

Fixed Size 1218364 bytes

Variable Size 88082628 bytes

Database Buffers 83886080 bytes

Redo Buffers 2973696 bytes

ORA-00205: error in identifying control file, check alert log for more info

通过告警日志获得信息：

ALTER DATABASE MOUNT

Mon Aug 1 06:14:57 2011

ORA-00202: control file: '/disk2/lx02/oradata/control03.ctl'

ORA-27037: unable to obtain file status

Linux Error: 2: No such file or directory

Additional information: 3

06:14:57 SQL> shutdown

ORA-01507: database not mounted

ORACLE instance shut down.

06:15:14 SQL> !

[oracle@oracle dbs]$ cp /disk1/lx02/oradata/control02.ctl /disk2/lx02/oradata/control03.ctl

[oracle@oracle dbs]$ sqlplus '/as sysdba'

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 1 06:15:36 2011

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to an idle instance.

06:15:37 SQL> startup

ORACLE instance started.

Total System Global Area 176160768 bytes

Fixed Size 1218364 bytes

Variable Size 88082628 bytes

Database Buffers 83886080 bytes

Redo Buffers 2973696 bytes

Database mounted.

Database opened.

06:15:47 SQL> select name from v$controlfile;

NAME

------------------------------------------------------------------------------------------------------------------------------------------------------

/u01/app/oracle/oradata/lx02/control01.ctl

/disk1/lx02/oradata/control02.ctl

/disk2/lx02/oradata/control03.ctl

06:16:00 SQL>

所有的文件丢失：

06:16:00 SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

06:17:22 SQL> !

[oracle@oracle dbs]$ rm /u01/app/oracle/oradata/lx02/control01.ctl

[oracle@oracle dbs]$ rm /disk1/lx02/oradata/control02.ctl

[oracle@oracle dbs]$ rm /disk2/lx02/oradata/control03.ctl

[oracle@oracle dbs]$ sqlplus '/as sysdba'

SQL*Plus: Release 10.2.0.1.0 - Production on Mon Aug 1 06:17:51 2011

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to an idle instance.

06:17:51 SQL> startup

ORACLE instance started.

Total System Global Area 176160768 bytes

Fixed Size 1218364 bytes

Variable Size 88082628 bytes

Database Buffers 83886080 bytes

Redo Buffers 2973696 bytes

ORA-00205: error in identifying control file, check alert log for more info

告警日志：

ALTER DATABASE MOUNT

Mon Aug 1 06:17:54 2011

ORA-00202: control file: '/u01/app/oracle/oradata/lx02/control01.ctl'

ORA-27037: unable to obtain file status

Linux Error: 2: No such file or directory

Additional information: 3

Mon Aug 1 06:17:54 2011

利用trace 文件重建

在nomount 状态

06:19:51 SQL>CREATE CONTROLFILE REUSE DATABASE "LX02" RESETLOGS NOARCHIVELOG

MAXLOGFILES 16

MAXLOGMEMBERS 2

MAXDATAFILES 30

MAXINSTANCES 1

MAXLOGHISTORY 292

LOGFILE

GROUP 1 '/u01/app/oracle/oradata/lx02/redo01a.log' SIZE 10M,

GROUP 2 '/u01/app/oracle/oradata/lx02/redo02a.log' SIZE 10M

-- STANDBY LOGFILE

DATAFILE

'/u01/app/oracle/oradata/lx02/system01.dbf',

'/u01/app/oracle/oradata/lx02/rtbs01.dbf',

'/u01/app/oracle/oradata/lx02/sysaux01.dbf',

'/u01/app/oracle/oradata/lx02/user01.dbf',

'/u01/app/oracle/oradata/lx02/example01.dbf',

'/u01/app/oracle/oradata/lx02/indx01.dbf',

'/u01/app/oracle/oradata/lx02/OLTP01.DBF'

CHARACTER SET ZHS16GBK

06:21:23 20 ;

Control file created.

06:21:27 SQL> alter database open resetlogs;

Database altered.

06:21:39 SQL>

--------------非正常关库，重建控制文件

00:43:07 SQL> insert into scott.test values (10);

1 row created.

00:43:22 SQL> insert into scott.test values (11);

1 row created.

00:43:25 SQL> commit;

Commit complete.

00:43:27 SQL> alter system switch logfile;

System altered.

00:43:29 SQL> /

System altered.

00:43:31 SQL> /

System altered.

00:43:36 SQL> shutdown abort ;database 异常关闭

ORACLE instance shut down.

00:43:44 SQL> !

[oracle@work dbs]$ rm /disk1/oradata/test/control02.ctl

[oracle@work dbs]$ rm /disk2/oradata/test/control03.ctl

[oracle@work dbs]$ rm /u01/app/oracle/oradata/test/control01.ctl

[oracle@work dbs]$ !sql

sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Sat Aug 27 00:44:11 2011

Copyright (c) 1982, 2005, Oracle. All rights reserved.

Connected to an idle instance.

00:44:11 SQL>

00:44:11 SQL> startup

ORACLE instance started.

Total System Global Area 176160768 bytes

Fixed Size 1218364 bytes

Variable Size 88082628 bytes

Database Buffers 83886080 bytes

Redo Buffers 2973696 bytes

ORA-00205: error in identifying control file, check alert log for more info

00:44:15 SQL> @/home/oracle/control.sql

00:44:25 SQL> CREATE CONTROLFILE REUSE DATABASE "TEST" NORESETLOGS NOARCHIVELOG

00:44:25 2 MAXLOGFILES 16

00:44:25 3 MAXLOGMEMBERS 4

00:44:25 4 MAXDATAFILES 100

00:44:25 5 MAXINSTANCES 1

00:44:25 6 MAXLOGHISTORY 20

00:44:25 7 LOGFILE

00:44:25 8 GROUP 1 '/u01/app/oracle/oradata/test/redo01a.log' SIZE 10M,

00:44:25 9 GROUP 2 '/u01/app/oracle/oradata/test/redo02a.log' SIZE 10M,

00:44:25 10 GROUP 3 '/u01/app/oracle/oradata/test/redo03a.log' SIZE 10M

00:44:25 11 -- STANDBY LOGFILE

00:44:25 12 DATAFILE

00:44:25 13 '/u01/app/oracle/oradata/test/system01.dbf',

00:44:25 14 '/u01/app/oracle/oradata/test/rtbs01.dbf',

00:44:25 15 '/u01/app/oracle/oradata/test/sysaux01.dbf',

00:44:25 16 '/u01/app/oracle/oradata/test/users01.dbf'

00:44:25 17 CHARACTER SET ZHS16GBK

00:44:25 18 ;

Control file created.

00:44:26 SQL> select checkpoint_change# from v$database;

CHECKPOINT_CHANGE#

------------------

325588

00:44:35 SQL> select checkpoint_change# from v$datafile;

CHECKPOINT_CHANGE#

------------------

325588

325588

325588

325588

00:44:38 SQL> select checkpoint_change# from v$datafile_header;

CHECKPOINT_CHANGE#

------------------

325588

325588

325588

325588

00:44:41 SQL> alter database open;

alter database open

*

ERROR at line 1:

ORA-01113: file 1 needs media recovery

ORA-01110: data file 1: '/u01/app/oracle/oradata/test/system01.dbf'

00:44:47 SQL> archive log list;

Database log mode No Archive Mode

Automatic archival Disabled

Archive destination /u01/app/oracle/product/10.2.0/db_1/dbs/arch

Oldest online log sequence 57

Current log sequence 59

00:45:27 SQL> recover database until cancel; 或者 23:35:59 SQL> recover database until cancel using backup controlfile;

ORA-00279: change 325588 generated at 08/27/2011 00:43:36 needed for thread 1

ORA-00289: suggestion : /u01/app/oracle/product/10.2.0/db_1/dbs/arch1_59_759630389.dbf

ORA-00280: change 325588 for thread 1 is in sequence #59

00:45:43 Specify log: {<RET>=suggested | filename | AUTO | CANCEL}

cancel

ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below

ORA-01194: file 1 needs more recovery to be consistent

ORA-01110: data file 1: '/u01/app/oracle/oradata/test/system01.dbf'

ORA-01112: media recovery not started

--------通过当前redo 日志进行database recover

00:45:52 SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM

---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ---------

1 1 58 10485760 1 NO INACTIVE 325585 27-AUG-11

3 1 57 10485760 1 NO INACTIVE 325583 27-AUG-11

2 1 59 10485760 1 NO CURRENT 325588 27-AUG-11

00:46:02 SQL> col member for a50

00:46:12 SQL> select group# ,member from v$logfile;

GROUP# MEMBER

---------- --------------------------------------------------

2 /u01/app/oracle/oradata/test/redo02a.log

1 /u01/app/oracle/oradata/test/redo01a.log

3 /u01/app/oracle/oradata/test/redo03a.log

00:46:18 SQL> recover database until cancel;

ORA-00279: change 325588 generated at 08/27/2011 00:43:36 needed for thread 1

ORA-00289: suggestion : /u01/app/oracle/product/10.2.0/db_1/dbs/arch1_59_759630389.dbf

ORA-00280: change 325588 for thread 1 is in sequence #59

00:46:23 Specify log: {<RET>=suggested | filename | AUTO | CANCEL}

/u01/app/oracle/oradata/test/redo02a.log

Log applied.

Media recovery complete.

00:46:30 SQL> alter database open resetlogs;

Database altered.

00:46:59 SQL> select * from scott.test;

ID

----------

1

2

3

4

5

6

7

9

10

11

10 rows selected.

00:47:05 SQL>
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