Oracle11g温习-第六章：控制文件

2013年4月27日星期六

10:33

1、控制文件的功能和特点

1) 【定义数据库当前物理状态】

2) 【维护数据的一致性】如果控制文件中的检查点与数据文件中的一致，则说明数据一致，可以启动到open状态

3) 【很小的二进制文件】

4)【控制文件包括静态部分、动态部分当使用rman备份数据库的时候, 控制文件会记录catalog信息, 动态部分会增大】

查看数据一致性的方法：

SQL> select file#,checkpoint_change# from v$datafile;【从控制文件读取】以控制文件为主

FILE# CHECKPOINT_CHANGE#

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

1 172373

2 172373

3 172373

4 172373

SQL> select file#,checkpoint_change# from v$datafile_header;【从数据文件读取】

FILE# CHECKPOINT_CHANGE#

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

1 172373

2 172373

3 172373

4 172373

3)二进制文件

4)在mount阶段被读取

5)记录备份恢复信息

----------查看database控制文件位置：

SQL> show parameter control;

NAME TYPE VALUE

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

control_file_record_keep_time integer 7

control_files string /u01/app/oracle/oradata/test/control01.ctl

SQL> select name from v$controlfile;

NAME

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

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

SYS@ prod>select * from v$rollname; 查看undo 段

USN NAME

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

0 SYSTEM

1 _SYSSMU1$

2 _SYSSMU2$

3 _SYSSMU3$

4 _SYSSMU4$

5 _SYSSMU5$

6 _SYSSMU6$

7 _SYSSMU7$

8 _SYSSMU8$

9 _SYSSMU9$

10 _SYSSMU10$

2、控制文件的内容

SQL> alter database backup controlfile to trace;【将控制文件备份成trace文件】

建议：只要对数据库的物理结构进行修改，都应该进行控制文件的备份或者转储

V$DATABASE 查看数据库信息

V$LOGFILE,V$LOG 查看日志信息

V$DATAFILE

V$CONTROLFILE 查看控制文件

SQL> show parameter dump

user_dump_dest string /u01/app/oracle/admin/orcl/udump

重建控制文件

SQL> CREATE CONTROLFILE REUSE DATABASE "orcl" NORESETLOGS ARCHIVELOG

MAXLOGFILES 16

MAXLOGMEMBERS 3

MAXDATAFILES 100

MAXINSTANCES 1

MAXLOGHISTORY 292

LOGFILE

GROUP 1 (

'/disk2/orcl/oradata/redo01a.log',

'/disk1/orcl/oradata/redo01b.log'

) SIZE 10M,

GROUP 2 (

'/disk2/orcl/oradata/redo02a.log',

'/disk1/orcl/oradata/redo02b.log'

) SIZE 10M

-- STANDBY LOGFILE

DATAFILE

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

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

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

'/u01/app/oracle/oradata/orcl/undo01.dbf',

CHARACTER SET ZHS16GBK;

------------利用ORACLE EVENT 转储控制文件

SQL> alter session set events 'immediate trace name controlf level 12';

3、控制文件多元化（复制多个控制文件并存放到不同的磁盘 注意控制文件3个足够不宜太多如果太多的话oracle 实时同步控制文件需要做物理i/o 消耗系统性能）

spfile：查看控制文件信息并修改control_file参数，将新增的控制文件路径写上；关闭实例，复制控制文件到相应路径；重新启动实例。

pfile：关闭实例，修改参数文件init；拷贝控制文件；重新启动实例。

修改spfile文件，增加控制文件

1)查看控制文件信息和spfile 信息

SQL> select name from v$controlfile;

NAME

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

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

SQL> show parameter control

NAME TYPE VALUE

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

control_file_record_keep_time integer 7

control_files string /u01/app/oracle/oradata/orcl/control01.ctl

SQL> show parameter spfile;

NAME TYPE VALUE

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

spfile string /u01/app/oracle/product/10.2.0/db_1/dbs/spfileorcl.ora

2)修改control_files 参数

SQL> alter system set control_files= '/u01/app/oracle/oradata/orcl/control01.ctl','/disk1/orcl/oradata/control02.ctl' scope=spfile;

System altered.

3)关闭instance ，拷贝controlfile

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

[oracle@oracle ~]$ cp /u01/app/oracle/oradata/orcl/control01.ctl /disk1/orcl/oradata/control02.ctl

4)startup 启动实例

SQL> startup

SQL> select name from v$controlfile;

NAME

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

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

/disk1/orcl/oradata/control02.ctl

修改pfile文件增加控制文件：

1)关闭实例，修改init 文件

SQL> startup pfile=$ORACLE_HOME/dbs/initorcl.ora

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.

SQL> show parameter spfile;

NAME TYPE VALUE

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

spfile string

SQL> select name from v$controlfile;

NAME

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

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

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

[oracle@oracle ~]$ cd $ORACLE_HOME/dbs

[oracle@oracle dbs]$ vi initorcl.ora

修改如下

control_files = /disk1/orcl/oradata/control01.ctl,/disk1/orcl/oradata/control02.ctl,/disk2/orcl/oradata/control03.ctl

2)拷贝controlfile

[oracle@oracle dbs]$ cp $ORACLE_BASE/oradata/orcl/control01.ctl /disk1/orcl/oradata/control02.ctl

[oracle@oracle dbs]$ cp $ORACLE_BASE/oradata/orcl/control01.ctl /disk2/orcl/oradata/control03.ctl

3)startup

SQL> startup pfile=$ORACLE_HOME/dbs/initorcl.ora;

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.

SQL> show parameter spfile

NAME TYPE VALUE

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

spfile string

SQL> select name from v$controlfile;

NAME

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

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

/disk1/orcl/oradata/control02.ctl

/disk2/orcl/oradata/control03.ctl

SQL> create spfile from pfile;

File created.

4、控制文件查看：v$controlfile 、show parameter controlfile、 v$parameter

5、控制文件备份

1)trace :用于控制文件重建 （生成的trace 文件在udump)

SQL> alter database backup controlfile to trace;

Database altered.

2)binary 文件 ：控制文件的备份

SQL> alter database backup controlfile to '/disk1/orcl/oradata/control.bak';

Database altered.

6、控制文件恢复

单个文件丢失：

[oracle@oracle dbs]$ rm /disk2/orcl/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

Connected to an idle instance.

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/orcl/oradata/control03.ctl'

ORA-27037: unable to obtain file status

Linux Error: 2: No such file or directory

Additional information: 3

SQL> shutdown

ORA-01507: database not mounted

ORACLE instance shut down.

SQL> !

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

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.

SQL> select name from v$controlfile;

NAME

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

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

/disk1/orcl/oradata/control02.ctl

/disk2/orcl/oradata/control03.ctl

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

案例

所有的文件丢失：

【先改变数据库的物理文件，然后备份到trace和二进制文件，然后又对数据进行修改，然后删除所有的控制文件】

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> !

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

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

[oracle@oracle dbs]$ rm /disk2/orcl/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

Connected to an idle instance.

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/orcl/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 一定要正常关库 .

SQL>CREATE CONTROLFILE REUSE DATABASE "orclgps" RESETLOGS NOARCHIVELOG

MAXLOGFILES 16

MAXLOGMEMBERS 2

MAXDATAFILES 30

MAXINSTANCES 1

MAXLOGHISTORY 292

LOGFILE

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

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

-- STANDBY LOGFILE

DATAFILE

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

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

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

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

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

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

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

CHARACTER SET ZHS16GBK

Control file created.

NORESETLOGS 不会重置日志文件可以做完全恢复

Set 如果修改数据库名字修要添加 SET DATABASE ‘DATABASENAME’ RESETLOGS 注意修改初始化参数文件 db_name

SQL> alter database open resetlogs;

Database altered.

非正常关库，重建控制文件

SQL> insert into scott.test values (10);

1 row created.

SQL> insert into scott.test values (11);

1 row created.

SQL> commit;

Commit complete.

SQL> alter system switch logfile; 产生增量检查点

System altered.

SQL> shutdown abort ; database 异常关闭

ORACLE instance shut down.

[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

Connected to an idle instance.

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

SQL> @/home/oracle/control.sql ;

SQL> CREATE CONTROLFILE REUSE DATABASE "TEST" NORESETLOGS NOARCHIVELOG

MAXLOGFILES 16

MAXLOGMEMBERS 4

MAXDATAFILES 100

MAXINSTANCES 1

MAXLOGHISTORY 20

LOGFILE

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

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

GROUP 3 '/u01/app/oracle/oradata/test/redo03a.log' SIZE 10M

-- STANDBY LOGFILE

DATAFILE

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

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

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

'/u01/app/oracle/oradata/test/users01.dbf'

CHARACTER SET ZHS16GBK

;

Control file created.

SQL> select checkpoint_change# from v$database;

CHECKPOINT_CHANGE#

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

325588

SQL> select checkpoint_change# from v$datafile;

CHECKPOINT_CHANGE#

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

325588

SQL> select checkpoint_change# from v$datafile_header;

CHECKPOINT_CHANGE#

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

325588

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'

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

SQL> recover database until cancel; 或者

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

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

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

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.

SQL> alter database open resetlogs;

Database altered.

SQL> select * from scott.test;

----------

10 rows selected.

TRACE文件、BAK文件、dump文件的区别

1、trace文件里面是控制文件的重建脚本，当数据库的物理结构发生变化时就要trace一下，否则会丢失，恢复时要使用最新的。

2、bak文件是controlfile的副本，里面包含检查点等所有的信息，用他备份会出现数据不一致的情况，数据库不能打开到open状态。

3、dump文件是用来查看controlfile里面的内容的，不能用来恢复控制文件。