unity3d 画线插件:深入讲解 Redo Log File 损坏的处理过程

redo log file 损坏的处理过程；
一、查看日志
Thu Mar 29 09:15:21 2007 Errors in file d:oracleadmings12366bdumpgs12366_lgwr_2052.trc: ORA-00313: open failed for members of log group 1 of thread 1 ORA-00312: online log 1 thread 1: 'D:ORACLEORADATAGS12366REDO01.LOG' ORA-27041: unable to open file OSD-04002: unable to open file O/S-Error: (OS 2) 系统找不到指定的文件。 Thu Mar 29 09:15:21 2007 Errors in file d:oracleadmings12366bdumpgs12366_lgwr_2052.trc: ORA-00313: open failed for members of log group 1 of thread 1 ORA-00312: online log 1 thread 1: 'D:ORACLEORADATAGS12366REDO01.LOG' ORA-27041: unable to open file OSD-04002: unable to open file O/S-Error: (OS 2) 系统找不到指定的文件。 Thu Mar 29 09:15:21 2007 ORA-313 signalled during: alter database open ... Thu Mar 29 09:16:38 2007 alter database open Thu Mar 29 09:16:38 2007 Errors in file d:oracleadmings12366bdumpgs12366_lgwr_2052.trc: ORA-00341: log 1 of thread 1, wrong log # 2 in header ORA-00312: online log 1 thread 1: 'D:ORACLEORADATAGS12366REDO01.LOG' Thu Mar 29 09:16:38 2007 Errors in file d:oracleadmings12366bdumpgs12366_lgwr_2052.trc: ORA-00341: log 1 of thread 1, wrong log # 2 in header ORA-00312: online log 1 thread 1: 'D:ORACLEORADATAGS12366REDO01.LOG' Thu Mar 29 09:16:38 2007 ORA-341 signalled during: alter database open...
二、查看日志当前状态
C:Documents and Settingsgs12366>sqlplus /nolog SQL*Plus: Release 9.2.0.1.0 - Production on Fri Mar 30 09:39:42 2007 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved. SQL> conn / as sysdba Connected. SQL> archive log list Database log mode No Archive Mode Automatic archival Disabled Archive destination d:oracleora92RDBMS Oldest online log sequence 0 Current log sequence 531 SQL> select * from v$logfile; GROUP# STATUS TYPE ---------- ------- ------- MEMBER --------------------------------------- 1 ONLINE D:ORACLEORADATAGS12366REDO01.LOG 2 ONLINE D:ORACLEORADATAGS12366REDO02.LOG 3 STALE ONLINE D:ORACLEORADATAGS12366REDO03.LOG SQL> select * from v$log; GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS ---------- ---------- ---------- ---------- FIRST_CHANGE# FIRST_TIM ------------- --------- 1 1 0 104857600 1 NO UNUSED 0 27-MAR-07 2 1 530 104857600 1 NO INACTIVE 47709153 27-MAR-07 3 1 531 104857600 1 NO INVALIDATED 48070450 28-MAR-07 SQL> SQL> alter system switch logfile; alter system switch logfile * ERROR at line 1: ORA-01109: database not open
注：确定丢失了D:\ORACLE\ORA\DATA\GS12366\REDO01.LOG
解决过程如下：
SQL> shutdown immediate ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 1670457484 bytes Fixed Size 456844 bytes Variable Size 595591168 bytes Database Buffers 1073741824 bytes Redo Buffers 667648 bytes Database mounted. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 1 NO UNUSED 2 NO INACTIVE 3 NO INVALIDATED SQL> alter database drop logfile group 1; Database altered. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 2 NO INACTIVE 3 NO INVALIDATED SQL> alter database open; Database altered. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 2 NO CURRENT 3 NO INACTIVE SQL> alter database add logfile group 1 'd:oracleoradatags12366redo01.log' s ize 104857600 reuse; Database altered. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 1 YES UNUSED 2 NO CURRENT 3 NO INACTIVE SQL> alter system switch logfile; System altered. SQL> alter system switch logfile; System altered. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 1 NO INACTIVE 2 NO INACTIVE 3 NO CURRENT SQL> alter system switch logfile; System altered. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 1 NO INACTIVE 2 NO CURRENT 3 NO ACTIVE SQL> alter system switch logfile; System altered. SQL> select group#,archived,status from v$log; GROUP# ARC STATUS ---------- --- ---------------- 1 NO CURRENT 2 NO ACTIVE 3 NO INACTIVE