归档模式下redo丢失或损坏(active状态)


++++Session 1

SQL> create table t as select * from dba_objects;

Table created.

SQL> create index t_idx_id on t(object_id);

Index created.

SQL> select count(1) from t;

COUNT(1)

----------

14039

SQL> delete from t where rownum<1001;

1000 rows deleted.

SQL> commit;

Commit complete.

++++Session 2

SQL> alter system switch logfile;

System altered.

SQL> select * from v$log;

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

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

1 1 24 52428800 512 1 NO CURRENT 1650411 29-DEC-15 2.8147E+14

2 1 23 20971520 512 1 YES ACTIVE 1650242 29-DEC-15 1650411 29-DEC-15

3 1 22 52428800 512 1 YES INACTIVE 1650239 29-DEC-15 1650242 29-DEC-15

SQL> col member format a50

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/redo02.log bs=512 count=10

0+0 records in

0+0 records out

0 bytes (0 B) copied, 0.000120067 s, 0.0 kB/s

状态是active的，可以是arc，也可以是NO

++++Session 2

SQL&get; shutdown abort;

ORACLE instance shut down.

SQL&get;

SQL&get; startup mount

ORACLE instance started.

Total System Global Area 167772160 bytes

Fixed Size 1272600 bytes

Variable Size 67110120 bytes

Database Buffers 96468992 bytes

Redo Buffers 2920448 bytes

Database mounted.

恢复失败，如果恢复成功直接可以open resetlogs;

SQL> recover database;

ORA-00283: recovery session canceled due to errors

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

ORA-00312: online log 1 thread 1: '/u01/app/oracle/oradata/orcl/redo01.log'

ORA-27047: unable to read the header block of file

Linux-x86_64 Error: 25: Inappropriate ioctl for device

Additional information: 1

SQL> recover database until cancel;

ORA-00279: change 1628785 generated at 12/29/2015 14:57:25 needed for thread 1

ORA-00289: suggestion : /u01/app/oracle/product/11.2.0.4/db_1/dbs/arch1_97_896791384.dbf

ORA-00280: change 1628785 for thread 1 is in sequence #97

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_97_896791384.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_97_896791384.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> create pfile='/tmp/pfile.ora' from spfile;

File created.

----pfile文件加入如下隐含参数：

*._allow_resetlogs_corruption=true

*._allow_error_simulation=true

SQL> shutdown abort;

ORACLE instance shut down.

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

ORACLE instance started.

Total System Global Area 167772160 bytes

Fixed Size 1272600 bytes

Variable Size 67110120 bytes

Database Buffers 96468992 bytes

Redo Buffers 2920448 bytes

Database mounted.

SQL> alter database open resetlogs;

Database altered.