oracle控制文件如何恢复,Oracle控制文件的恢复(三) Oracle控制文件如何恢复?...

本文详细描述了如何在Oracle数据库意外关闭后,面对丢失所有控制文件的情况,通过redo日志进行恢复步骤,包括查找redo文件、应用更改并打开数据库。关键操作包括查看redo log、恢复数据库直到取消和最终打开reset logs。

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丢失所有控制文件,并且异常关闭数据库,场景模拟如下: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

恢复步骤:

=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

(2)通过当前redo 日志进行database recover00:45:52 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: {

=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.

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