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oracle10g online redolog lost(当前日志文件丢失)

今天有人提起丢失current online redolog,如何打开数据库,我也模拟一把

环境 oracle 10g r2
archivelog model
数据库打开的情况下os rm logfile


sys@ORCL> select * from v$log;
 
    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1         61   52428800          2 YES ACTIVE              1339107572 2011-06-28 17:41:09
         2          1         62   52428800          2 YES ACTIVE              1339107576 2011-06-28 17:41:16
         3          1         63   52428800          2 NO  CURRENT             1339107587 2011-06-28 17:41:25
         5          1         60   52428800          2 YES INACTIVE            1339107550 2011-06-28 17:40:14
 
sys@ORCL> select * from v$logfile;
 
    GROUP# STATUS  TYPE    MEMBER                                                                           IS_
---------- ------- ------- -------------------------------------------------------------------------------- ---
         5         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/redo5.log                                 NO
         5         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo5.log                     NO
         3         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_3_5y4dgorl_.log                     NO
         3         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_3_5y4dgq04_.log         NO
         2         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_2_70ljvbqf_.log                     NO
         2         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo2_2.log                   NO
         1         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_1_5y4dgjvk_.log                     NO
         1         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_1_5y4dgl2s_.log         NO
 
8 rows selected.
 
sys@ORCL> alter system checkpoint;
 
System altered.
 
sys@ORCL> select * from v$log;
 
    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1         61   52428800          2 YES INACTIVE            1339107572 2011-06-28 17:41:09
         2          1         62   52428800          2 YES INACTIVE            1339107576 2011-06-28 17:41:16
         3          1         63   52428800          2 NO  CURRENT             1339107587 2011-06-28 17:41:25
         5          1         60   52428800          2 YES INACTIVE            1339107550 2011-06-28 17:40:14

sys@ORCL> ! rm /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_3_5y4dgorl_.log
 
sys@ORCL> ! rm /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_3_5y4dgq04_.log
 
sys@ORCL> alter system switch logfile;
 
System altered.
 
sys@ORCL> alter system switch logfile;
 
System altered.
 
sys@ORCL> select * from v$log;
 
    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1         65   52428800          2 NO  CURRENT             1339107758 2011-06-28 17:48:43
         2          1         62   52428800          2 YES INACTIVE            1339107576 2011-06-28 17:41:16
         3          1         63   52428800          2 NO  ACTIVE              1339107587 2011-06-28 17:41:25
         5          1         64   52428800          2 NO  ACTIVE              1339107755 2011-06-28 17:48:36
 
sys@ORCL> alter system checkpoint;
 
System altered.
 
sys@ORCL> alter system switch logfile;
 
System altered.
 
sys@ORCL> select * from v$log;
 
    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1         65   52428800          2 NO  ACTIVE              1339107758 2011-06-28 17:48:43
         2          1         66   52428800          2 NO  CURRENT             1339107774 2011-06-28 17:49:11
         3          1         63   52428800          2 NO  INACTIVE            1339107587 2011-06-28 17:41:25
         5          1         64   52428800          2 NO  INACTIVE            1339107755 2011-06-28 17:48:36
 
sys@ORCL> alter system switch logfile;
 
 
--没反应 
 
alter system switch logfile
*
ERROR at line 1:
ORA-01013: user requested cancel of current operation
 
 
 
sys@ORCL> sys@ORCL> sys@ORCL> sys@ORCL> sys@ORCL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
sys@ORCL> startup
ORACLE instance started.
 
Total System Global Area 1258291200 bytes
Fixed Size                  1219184 bytes
Variable Size             385877392 bytes
Database Buffers          855638016 bytes
Redo Buffers               15556608 bytes
Database mounted.
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/onlinelog/o1_mf_3_5y4dgorl_.log'
ORA-00312: online log 3 thread 1: '/u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_3_5y4dgq04_.log'
 
 
sys@ORCL> recover database until cancel;
Media recovery complete.
sys@ORCL> alter database resetlogs;
alter database resetlogs
                       *
ERROR at line 1:
ORA-02231: missing or invalid option to ALTER DATABASE
 
 
sys@ORCL> alter database open resetlogs;
 
Database altered.
 
sys@ORCL> select * from v$log;
 
    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1          2   52428800          2 NO  CURRENT             1339107896 2011-06-28 17:54:23
         2          1          1   52428800          2 YES INACTIVE            1339107895 2011-06-28 17:54:13
         3          1          0   52428800          1 YES UNUSED                       0
         5          1          0   52428800          2 YES UNUSED                       0
 
sys@ORCL> select * from v$logfile;
 
    GROUP# STATUS  TYPE    MEMBER                                                                           IS_
---------- ------- ------- -------------------------------------------------------------------------------- ---
         5         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/redo5.log                                 NO
         5         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo5.log                     NO
         3         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_3_70m96bz0_.log                     NO
         1         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_1_5y4dgjvk_.log                     NO
         2         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_2_70ljvbqf_.log                     NO
         2         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo2_2.log                   NO
         1         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_1_5y4dgl2s_.log         NO
 
7 rows selected.
 
sys@ORCL> !ls /u01/app/oracle/oradata/ORCL/onlinelog 
o1_mf_1_5y4dgjvk_.log  o1_mf_2_70ljvbqf_.log  o1_mf_3_70m96bz0_.log  redo5.log
 
sys@ORCL> alter database add logfile member '/u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo3_2.log' to group 3;
 
Database altered.
 
sys@ORCL> select * from v$log;
 
    GROUP#    THREAD#  SEQUENCE#      BYTES    MEMBERS ARC STATUS           FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- -------------------
         1          1          2   52428800          2 NO  CURRENT             1339107896 2011-06-28 17:54:23
         2          1          1   52428800          2 YES INACTIVE            1339107895 2011-06-28 17:54:13
         3          1          0   52428800          2 YES UNUSED                       0
         5          1          0   52428800          2 YES UNUSED                       0
 
sys@ORCL> select * from v$logfile;
 
    GROUP# STATUS  TYPE    MEMBER                                                                           IS_
---------- ------- ------- -------------------------------------------------------------------------------- ---
         5         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/redo5.log                                 NO
         5         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo5.log                     NO
         3         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_3_70m96bz0_.log                     NO
         1         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_1_5y4dgjvk_.log                     NO
         2         ONLINE  /u01/app/oracle/oradata/ORCL/onlinelog/o1_mf_2_70ljvbqf_.log                     NO
         2         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo2_2.log                   NO
         1         ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/o1_mf_1_5y4dgl2s_.log         NO
         3 INVALID ONLINE  /u01/app/oracle/flash_recovery_area/ORCL/onlinelog/redo3_2.log                   NO
 
8 rows selected.
 
sys@ORCL> startup force
ORACLE instance started.
 
Total System Global Area 1258291200 bytes
Fixed Size                  1219184 bytes
Variable Size             385877392 bytes
Database Buffers          855638016 bytes
Redo Buffers               15556608 bytes
Database mounted.
Database opened.
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