oracle未归档current redo丢失或损坏


oracle未归档current redo损坏的恢复

如下例子：

----Session 1

SQL> conn zw/zw

Connected.

SQL> select count(1) from t;

COUNT(1)

----------

14041

SQL> delete from t where rownum < 1001;

1000 rows deleted.

SQL> commit;

Commit complete.

---Session 2

SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME

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

1 1 13 52428800 512 1 NO INACTIVE 1692121 29-DEC-15 1692124 29-DEC-15

2 1 14 20971520 512 1 NO INACTIVE 1692124 29-DEC-15 1692127 29-DEC-15

3 1 15 52428800 512 1 NO CURRENT 1692127 29-DEC-15 2.8147E+14

SQL> select * from v$logfile;

GROUP# STATUS TYPE MEMBER IS_

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

1 ONLINE /u01/app/oracle/oradata/orcl/redo01.log NO

2 ONLINE /u01/app/oracle/oradata/orcl/redo02.log NO

3 ONLINE /u01/app/oracle/oradata/orcl/redo03.log NO

---Session 3

[root@zw_test_26_75 ~]# dd if=/dev/null of=/u01/app/oracle/oradata/orcl/redo03.log bs=512 count=10

0+0 records in

0+0 records out

0 bytes (0 B) copied, 0.000112526 s, 0.0 kB/s

SQL> shutdown immediate

ORA-03113: end-of-file on communication channel

Process ID: 20455

Session ID: 145 Serial number: 3

SQL> recover database;

ORA-00283: recovery session canceled due to errors

ORA-00313: open failed for members of log group 3 of thread 1

ORA-00312: online log 3 thread 1: '/u01/app/oracle/oradata/orcl/redo03.log'

ORA-27048: skgfifi: file header information is invalid

Additional information: 12

SQL> recover database until cancel;

ORA-00279: change 1692127 generated at 12/29/2015 16:56:53 needed for thread 1

ORA-00289: suggestion :

/u01/app/oracle/product/11.2.0.4/db_1/dbs/arch1_15_899742732.dbf

ORA-00280: change 1692127 for thread 1 is in sequence #15

Specify log: {<RET>=suggested | filename | AUTO | CANCEL}

auto

ORA-00308: cannot open archived log

'/u01/app/oracle/product/11.2.0.4/db_1/dbs/arch1_15_899742732.dbf'

ORA-27037: unable to obtain file status

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

ORA-00308: cannot open archived log

'/u01/app/oracle/product/11.2.0.4/db_1/dbs/arch1_15_899742732.dbf'

ORA-27037: unable to obtain file status

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

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/orcl/system01.dbf'

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

添加隐含参数

[oracle@zw_test_26_75 tmp]$ vi pfile.ora

*._allow_resetlogs_corruption=true

*._allow_error_simulation=true

~

SQL> startup mount pfile='/tmp/pfile.ora';

ORACLE instance started.

Total System Global Area 952020992 bytes

Fixed Size 2258960 bytes

Variable Size 314574832 bytes

Database Buffers 629145600 bytes

Redo Buffers 6041600 bytes

Database mounted.

SQL>

SQL> alter database open resetlogs;

alter database open resetlogs

*

ERROR at line 1:

ORA-01092: ORACLE instance terminated. Disconnection forced

ORA-00600: internal error code, arguments: [2662], [0], [1692134], [0],

[1692312], [4194432], [], [], [], [], [], []

Process ID: 20866

Session ID: 145 Serial number: 3

SQL> recover database until cancel;

ORA-00283: recovery session canceled due to errors

ORA-16433: The database must be opened in read/write mode.

SQL> alter database open resetlogs;

alter database open resetlogs

*

ERROR at line 1:

ORA-01139: RESETLOGS option only valid after an incomplete database recovery

打开失败

++++ 使用10015 event手工推进scn

SQL> startup mount pfile='/tmp/pfile.ora';

ORACLE instance started.

Total System Global Area 952020992 bytes

Fixed Size 2258960 bytes

Variable Size 314574832 bytes

Database Buffers 629145600 bytes

Redo Buffers 6041600 bytes

Database mounted.

SQL>

SQL> alter session set events '10015 trace name adjust_scn level 1';

Session altered.

SQL> alter database open;

Database altered.

SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME

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

1 1 1 52428800 512 1 NO INACTIVE 1692128 29-DEC-15 1712135 29-DEC-15

2 1 2 20971520 512 1 NO CURRENT 1712135 29-DEC-15 2.8147E+14

3 1 0 52428800 512 1 YES UNUSED 0 0

SQL> alter system switch logfile;

System altered.

SQL> /

System altered.

SQL> /

System altered.

SQL>

System altered.

SQL>

----Session 1

SQL> conn zw/zw

Connected.

SQL> select count(1) from t;

COUNT(1)

----------

14041

SQL> delete from t where rownum < 1001;

1000 rows deleted.

SQL> commit;

Commit complete.

SQL> select count(1) from t;

COUNT(1)

----------

13041

恢复后的

-----session 2

SQL> select count(1) from t;

COUNT(1)

----------

13041