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HomeDatabaseMysql Tutorial【翻译自mos中文文章】重建控制文件的方法

【翻译自mos中文文章】重建控制文件的方法

Jun 07, 2016 pm 03:59 PM
Chinesecontroldocumentarticlemethodreconstruction

重建控制文件的方法 参考原文: How to Recreate a Controlfile (Doc ID 735106.1) 适用于: Oracle Database - Enterprise Edition - Version 9.0.1.0 and later Information in this document applies to any platform. 解决方案: 警告: 只有遇到下列场

重建控制文件的方法

参考原文:
How to Recreate a Controlfile (Doc ID 735106.1)

适用于:
Oracle Database - Enterprise Edition - Version 9.0.1.0 and later
Information in this document applies to any platform.

解决方案:

警告:
只有遇到下列场景时,你才应该recreate 你的控制文件

1.所有的当前的控制文件copies 已经丢失 或者 都已经损坏(corrupted)
2.你正在restore一个backup,在此backup中控制文件已经损坏 或者丢失(missing)
3.你需要在控制文件中改变一个hard limit 的数据库参数(database parameter)
4.如果你正在move 你的database 到一个server上,并且files位于不同的location上。
5. oracle 技术支持人员建议你重建控制文件。

第一种情况:在已经存在的db中(并且该db是mount or open状态)建立一个新的controlfile

首先,必须生成一个控制文件的ascii dump文件
SQL> alter database backup controlfile to trace;

该trace文件被生成在udump目录下:
SQL> show parameter user_dump_dest

NAME TYPE VALUE
-------------- ------ ------------------------------------------------
user_dump_dest string /oracle/product/11.1.0/db_1/diag/rdbms/V11/trace

到/oracle/product/11.1.0/db_1/diag/rdbms/V11/trace目录下,按照时间排序:
% cd /oracle/product/11.1.0/db_1/diag/rdbms/V11/trace
% ls -ltr

一旦定位到该文件,该文件会与一般的trace file一样显示如下:
Trace file /oracle/product/11.1.0/db_1/diag/rdbms/V11/trace/V11_ora_31225.trc
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /oracle/product/11.1.0/db_1

你感兴趣的是 包括 控制文件创建脚本的那一段。
修改trace file 并用修改后的脚本来建立控制文件

CREATE CONTROLFILE REUSE DATABASE "V11" NORESETLOGS ARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 292
LOGFILE
GROUP 1 '/oradata/V11/redo01.log' SIZE 50M,
GROUP 2 '/oradata/V11/redo02.log' SIZE 50M,
GROUP 3 '/oradata/V11/redo03.log' SIZE 50M
DATAFILE
'/oradata/V11/system01.dbf',
'/oradata/V11/sysaux01.dbf',
'/oradata/V11/undotbs01.dbf',
'/oradata/V11/user01.dbf'
CHARACTER SET WE8MSWIN1252
;

--->请特别注意:CHARACTER SET WE8MSWIN1252 可以由 alert_sid.log中得到。

ALTER TABLESPACE TEMP_TEST ADD TEMPFILE '/oradata/V11/temp01.dbf' reuse;

"CREATE CONTROLFILE"之前的任何东西请删掉,
CHARACTER SET之后的任何东西请删掉,一定要保留那个分号
在上面的例子中,我们选择了NORESETLOGS 选项,并且该db运行于archivelog模式下。
请务必保证使用shutdown immediate选项来关闭数据库。然后启动到nomount状态下:
SQL> shutdown immediate;
SQL> startup nomount;
SQL>@control.sql

注意:当重建控制文件完毕后,务必保证添加已经存在temp file:
alter tablespace temp_ts add tempfile '?/oradata/V11/temp01.dbf'? reuse;
控制文件一旦被创建,db 被自动带入到mounted 状态。如果你使用了resetlogs打开了database,请尽快做一个backup

第二种情况:该db无法到mount 状态
1.要么restore 控制文件,
2.要么有一个重建控制文件的脚本,如下是一个例子:

CREATE CONTROLFILE REUSE DATABASE "DBNAME" NORESETLOGS ARCHIVELOG
Follow the format listing:
- Location of redo logs.
- Location of datafiles
- Specifying the characterset.

Once you have listed all files correctly you are ready to recreate your controlfile
SQL> startup nomount;
SQL>@control.sql

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