标签归档：_ALLOW_RESETLOGS_CORRUPTION

_allow_resetlogs_corruption和adjust_scn解决ORA-01190

发表于 2012 年 3 月 15 日由惜分飞

一、模拟offline文件然后resetlogs操作

1.设置datafile 5数据文件offline
2.rman备份数据库
3.关闭原数据库，删除数据文件/当前日志和部分归档日志
4.执行不完全恢复，resetlogs打开数据库(如下面操作)
[oracle@xifenfei ora11g]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Thu Mar 15 07:36:59 2012

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> recover database until cancel;
ORA-00279: change 868870 generated at 03/15/2012 03:32:11 needed for thread 1
ORA-00289: suggestion :
/u01/oracle/oradata/archivelog/ora11g/1_29_777766629.dbf
ORA-00280: change 868870 for thread 1 is in sequence #29


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
Media recovery cancelled.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open


SQL> alter database open resetlogs;

Database altered.

SQL> select file#,online_status,to_char(change#,'999999999999') from v$recover_file;

     FILE# ONLINE_STATUS  TO_CHAR(CHANGE#,'999999999
---------- -------------- --------------------------
         5 OFFLINE               868810

SQL> alter database datafile 5 online;
alter database datafile 5 online
*
ERROR at line 1:
ORA-01190: control file or data file 5 is from before the last RESETLOGS
ORA-01110: data file 5: '/u01/oracle/oradata/ora11g/xifenfei01.dbf'


SQL> select file#,to_char(checkpoint_change#,'999999999999'),
  2  to_char(last_change#,'999999999999') from v$datafile;

     FILE# TO_CHAR(CHECKPOINT_CHANGE# TO_CHAR(LAST_CHANGE#,'9999
---------- -------------------------- --------------------------
         1        868874
         2        868874
         3        868874
         4        868874
         5        868810                     868874

--可以看到offline的数据文件，没有因为resetlogs操作而改变
--CHECKPOINT_CHANGE#和RESETLOGS_CHANGE#信息
SQL> select file#,to_char(checkpoint_change#,'999999999999'),
  2  to_char(RESETLOGS_CHANGE#,'999999999999')
  3  from v$datafile_header;

     FILE# TO_CHAR(CHECKPOINT_CHANGE# TO_CHAR(RESETLOGS_CHANGE#,
---------- -------------------------- --------------------------
         1        868874                     868871
         2        868874                     868871
         3        868874                     868871
         4        868874                     868871
         5        868810                     787897

二、隐含参数设置

SQL> create pfile='/tmp/pfile' from spfile;

File created.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

在pfile中增加
_allow_resetlogs_corruption=true
_allow_error_simulation=TRUE(10g及其以上版本需要)

三、打开数据库,online离线文件

SQL> startup pfile='/tmp/pfile' mount;
ORACLE instance started.

Total System Global Area  368263168 bytes
Fixed Size                  1345016 bytes
Variable Size             293603848 bytes
Database Buffers           67108864 bytes
Redo Buffers                6205440 bytes
Database mounted.
--在mount状态下执行
SQL> alter session set events '10015 trace name adjust_scn level 2';

Session altered.


--[一定要]在mount状态下执行online操作
SQL> alter database datafile 5 online;

Database altered.
SQL> recover database until cancel;
ORA-00279: change 868810 generated at 03/13/2012 22:19:37 needed for thread 1
ORA-00289: suggestion :
/u01/oracle/oradata/archivelog/ora11g/1_27_777766629.dbf
ORA-00280: change 868810 for thread 1 is in sequence #27


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below
ORA-01190: control file or data file 1 is from before the last RESETLOGS
ORA-01110: data file 1: '/u01/oracle/oradata/ora11g/system01.dbf'


ORA-01112: media recovery not started


SQL> alter database open resetlogs;

Database altered.

SQL> select file#,online_status,to_char(change#,'999999999999') from v$recover_file;

no rows selected

姊妹篇:bbed解决ORA-01190

发表在 Oracle备份恢复 | 标签为 adjust_scn, ORA-01190, _ALLOW_RESETLOGS_CORRUPTION | 评论关闭

使用_allow_resetlogs_corruption打开无归档日志rman备份库

发表于 2012 年 3 月 8 日由惜分飞

rman还原恢复操作

--还原数据库
RMAN> restore database;
--恢复数据库
RMAN> recover database;

Starting recover at 2012-03-08 21:20:45
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=65 device type=DISK

starting media recovery

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 03/08/2012 21:20:47
RMAN-06053: unable to perform media recovery because of missing log
RMAN-06025: no backup of archived log for thread 1 with sequence 2936 and starting SCN of 25991695 found to restore
RMAN-06025: no backup of archived log for thread 1 with sequence 2935 and starting SCN of 25991652 found to restore
RMAN-06025: no backup of archived log for thread 1 with sequence 2934 and starting SCN of 25991649 found to restore
……………………
RMAN-06025: no backup of archived log for thread 1 with sequence 2902 and starting SCN of 25991156 found to restore
这里报日志缺少，实际上是备份的数据库文件后，没有备份归档日志，归档日志全部丢失

进行不完全恢复

SQL> recover database until cancel;
ORA-00279: change 25991194 generated at 03/08/2012 20:33:58 needed for thread 1
ORA-00289: suggestion : /opt/oracle/oradata/archivelog/chf/1_2902_752334071.dbf
ORA-00280: change 25991194 for thread 1 is in sequence #2902


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: '/opt/oracle/oradata/chf/system01.dbf'


ORA-01112: media recovery not started


SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/opt/oracle/oradata/chf/system01.dbf'

查看相关SCN

SQL> select file#,to_char(checkpoint_change#,'999999999999') from v$datafile;

     FILE# TO_CHAR(CHECK
---------- -------------
         1      25992214
         2      25992214
         3      25992214
         4      25992214
         5      25992214
         6      25992214
         7      25992214
         8      25992214
         9      25992214
        10      25992214
        11      25992214

     FILE# TO_CHAR(CHECK
---------- -------------
        13      25992214
        14      25992214

13 rows selected.

SQL> select file#,online_status,to_char(change#,'999999999999') from v$recover_file;

     FILE# ONLINE_ TO_CHAR(CHANG
---------- ------- -------------
         1 ONLINE       25991194
         2 ONLINE       25991194
         3 ONLINE       25991194
         4 ONLINE       25991194
         5 ONLINE       25991194
         6 ONLINE       25991194
         7 ONLINE       25991194
         8 ONLINE       25991194
         9 ONLINE       25991194
        10 ONLINE       25991194
        11 ONLINE       25991194

     FILE# ONLINE_ TO_CHAR(CHANG
---------- ------- -------------
        13 ONLINE       25991194
        14 ONLINE       25991194

13 rows selected.

SQL> select file#,to_char(checkpoint_change#,'999999999999') from v$datafile_header;

     FILE# TO_CHAR(CHECK
---------- -------------
         1      25991194
         2      25991194
         3      25991194
         4      25991194
         5      25991194
         6      25991194
         7      25991194
         8      25991194
         9      25991194
        10      25991194
        11      25991194

     FILE# TO_CHAR(CHECK
---------- -------------
        13      25991194
        14      25991194

13 rows selected.

--发现数据文件scn和控制文件不一致，重建控制文件，然后查询相关scn
SQL> select file#,to_char(checkpoint_change#,'999999999999') from v$datafile;

     FILE# TO_CHAR(CHECK
---------- -------------
         1      25991194
         2      25991194
         3      25991194
         4      25991194
         5      25991194
         6      25991194
         7      25991194
         8      25991194
         9      25991194
        10      25991194
        11      25991194

     FILE# TO_CHAR(CHECK
---------- -------------
        13      25991194
        14      25991194

13 rows selected.

SQL> select file#,online_status,to_char(change#,'999999999999') from v$recover_file;

     FILE# ONLINE_ TO_CHAR(CHANG
---------- ------- -------------
         1 ONLINE       25991194
         2 ONLINE       25991194
         3 ONLINE       25991194
         4 ONLINE       25991194
         5 ONLINE       25991194
         6 ONLINE       25991194
         7 ONLINE       25991194
         8 ONLINE       25991194
         9 ONLINE       25991194
        10 ONLINE       25991194
        11 ONLINE       25991194

     FILE# ONLINE_ TO_CHAR(CHANG
---------- ------- -------------
        13 ONLINE       25991194
        14 ONLINE       25991194

13 rows selected.

SQL> select file#,to_char(checkpoint_change#,'999999999999') from v$datafile_header;

     FILE# TO_CHAR(CHECK
---------- -------------
         1      25991194
         2      25991194
         3      25991194
         4      25991194
         5      25991194
         6      25991194
         7      25991194
         8      25991194
         9      25991194
        10      25991194
        11      25991194

     FILE# TO_CHAR(CHECK
---------- -------------
        13      25991194
        14      25991194

13 rows selected.
--此时所有scn均一致

尝试打开数据库

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/opt/oracle/oradata/chf/system01.dbf'


SQL> recover database using backup controlfile until cancel;
ORA-00279: change 25991194 generated at 03/08/2012 20:33:58 needed for thread 1
ORA-00289: suggestion : /opt/oracle/oradata/archivelog/chf/1_2902_752334071.dbf
ORA-00280: change 25991194 for thread 1 is in sequence #2902


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: '/opt/oracle/oradata/chf/system01.dbf'


ORA-01112: media recovery not started

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01194: file 1 needs more recovery to be consistent
ORA-01110: data file 1: '/opt/oracle/oradata/chf/system01.dbf'

使用隐含参数打开数据库

SQL> create pfile='/tmp/pfile' from spfile;

File created.

-------/tmp/pfile中加上----------
_allow_resetlogs_corruption= TRUE
---------------------------------

SQL> startup mount pfile='/tmp/pfile' force
ORACLE instance started.

Total System Global Area  622149632 bytes
Fixed Size                  2230912 bytes
Variable Size             419431808 bytes
Database Buffers          192937984 bytes
Redo Buffers                7548928 bytes
Database mounted.
SQL> alter database open resetlogs;

Database altered.

SQL> select open_mode from v$database;

OPEN_MODE
--------------------
READ WRITE

总结
这次的试验没有多少实际意义，但是可以说明几个问题：
1.所有的数据文件的scn都一致，甚至和控制文件的也一致，数据库不一定可以open成功
(怀疑是数据文件中的scn大于data header scn)
2.对于这样的问题，如果使用bbed修改所有数据文件header的scn不知道是否可以解决
3.如果rman只备份了数据文件而没有任何一个归档日志，数据库通过隐含参数还是可以open，抢救数据

发表在 rman备份/恢复 | 标签为 _ALLOW_RESETLOGS_CORRUPTION | 一条评论

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标签归档：_ALLOW_RESETLOGS_CORRUPTION

_allow_resetlogs_corruption和adjust_scn解决ORA-01190

使用_allow_resetlogs_corruption打开无归档日志rman备份库

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标签归档：_ALLOW_RESETLOGS_CORRUPTION

_allow_resetlogs_corruption和adjust_scn解决ORA-01190

使用_allow_resetlogs_corruption打开无归档日志rman备份库

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