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.