oracle - redo 损坏或删除处理方法

OS:

Oracle Linux Server release 5.7

DB:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

数据库打开模式，非归档模式，非当前日志损坏

SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 234
Current log sequence 236
SQL>

SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES BLOCKSIZE MEMBERS ARCHIVED STATUS FIRST_CHANGE# FIRST_TIME NEXT_CHANGE# NEXT_TIME
---------- ---------- ---------- ---------- ---------- ---------- -------- ---------------- ------------- ----------- ------------ -----------
1 1 234 52428800 512 1 NO INACTIVE 3298602 2013/10/31 3298605 2013/10/31
2 1 236 52428800 512 1 NO CURRENT 3298609 2013/10/31 281474976710
3 1 235 52428800 512 1 NO INACTIVE 3298605 2013/10/31 3298609 2013/10/31

[root@b28-122 yoon]# rm -rf redo01.log

[root@b28-122 yoon]# ls
control01.ctl redo02.log redo03.log sysaux01.dbf system01.dbf temp01.dbf undotbs01.dbf users01.dbf

SQL> alter system switch logfile;

System altered.

SQL> /

System altered.

SQL> /

System altered.

SQL> /

System altered.

SQL> /

System altered.

执行dml语句，以及切换日志都能成功，但是数据库重启就报错

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

SQL>

SQL> startup
ORACLE instance started.

Total System Global Area 3340451840 bytes
Fixed Size 2232960 bytes
Variable Size 2046823808 bytes
Database Buffers 1275068416 bytes
Redo Buffers 16326656 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
Process ID: 32731
Session ID: 1 Serial number: 5

SQL>

SQL> conn / as sysdba
Connected to an idle instance.
SQL> shutdown abort
ORACLE instance shut down.
SQL>

解决方法，数据库启动到mount，将损坏的日志文件清除日志组：

SQL> startup mount
ORACLE instance started.

Total System Global Area 3340451840 bytes
Fixed Size 2232960 bytes
Variable Size 2046823808 bytes
Database Buffers 1275068416 bytes
Redo Buffers 16326656 bytes
Database mounted.
SQL>

SQL> alter database clear logfile group 1;

Database altered.

SQL> alter database open;

Database altered.

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

Total System Global Area 3340451840 bytes
Fixed Size 2232960 bytes
Variable Size 2046823808 bytes
Database Buffers 1275068416 bytes
Redo Buffers 16326656 bytes
Database mounted.
Database opened.
SQL>

SQL> select member from v$logfile;

MEMBER
--------------------------------------------------------------------------------
/u01/oracle/oradata/yoon/redo03.log
/u01/oracle/oradata/yoon/redo02.log
/u01/oracle/oradata/yoon/redo01.log

非归档模式，数据库关闭，不是正在使用的日志文件损坏，解决方法同上。