Oracle redo损坏的处理


如果光是INACTIVE状态的redo损坏，有三种方法可以恢复： 1.clear logfile 相关命令： alter database clear logfile '/database/oradata/skyread/redo04.log'; --已经归档的操作 alter database clear unarchived logfile '/database/oradata/skyread/redo04.log'; --inactive未归档的操作 2.不完全恢复until cancel 启动到mount状态运行recover database until cancel; 3.重建控制文件resetlogs方法 采用重建控制文件脚本resetlogs的方式重建，应用相关redo，完成介质恢复，resetlogs不检查日志文件，所以不会报错 活动的在线日志损坏而且异常关闭的恢复： SQL> alter database backup controlfile to trace as '/home/Oracle/ctl.sql' reuse resetlogs;   Database altered.   SQL> create table t1 as select * from dba_objects;   Table created.   SQL> select * from v$log;   GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIME ---------------- ---------------- ---------------- ---------------- ---------------- --- ---------------- ---------------- ------------------- 1 1 31 536870912 1 YES INACTIVE 122695597193 2013-05-29 14:41:24 2 1 32 536870912 1 YES INACTIVE 122695676280 2013-05-31 13:38:04 3 1 29 536870912 1 YES INACTIVE 122695590894 2013-05-29 10:29:29 4 1 33 536870912 1 YES ACTIVE 122695698110 2013-05-31 14:15:47 5 1 34 536870912 1 NO CURRENT 122695861946 2013-06-04 13:48:31 破坏活动归档的日志文件，破坏控制文件，异常关机： SQL> shutdown abort; ORACLE instance shut down. 启动到mount状态时报错： SQL> startup; ORACLE instance started.   Total System Global Area 5049942016 bytes Fixed Size 2090880 bytes Variable Size 1375733888 bytes Database Buffers 3657433088 bytes Redo Buffers 14684160 bytes ORA-00205: error in identifying control file, check alert log for more info 重建控制文件,注意如果是noresetlogs是不成功的，这里由于redo04.log损坏，只能采用resetlogs，不检查日志文件 SQL> CREATE CONTROLFILE REUSE DATABASE "SKYREAD" NORESETLOGS FORCE LOGGING ARCHIVELOG 2 MAXLOGFILES 20 3 MAXLOGMEMBERS 5 4 MAXDATAFILES 1000 5 MAXINSTANCES 8 6 MAXLOGHISTORY 2337 7 LOGFILE 8 GROUP 1 '/database/oradata/skyread/redo01.log' SIZE 512M, 9 GROUP 2 '/database/oradata/skyread/redo02.log' SIZE 512M, 10 GROUP 3 '/database/oradata/skyread/redo03.log' SIZE 512M, 11 GROUP 4 '/database/oradata/skyread/redo04.log' SIZE 512M, 12 GROUP 5 '/database/oradata/skyread/redo05.log' SIZE 512M 13 DATAFILE 14 '/database/oradata/skyread/system01.dbf', 15 '/database/oradata/skyread/tbs_test.dbf', 16 '/database/oradata/skyread/sysaux01.dbf', 17 '/database/oradata/skyread/users01.dbf', 18 '/database/oradata/skyread/system02.dbf', 19 '/database2/oradata/skyread/undotbs02.dbf', 20 '/database2/oradata/skyread/TBS_MRPMUSIC01.dbf', 21 '/database/oradata/skyread/sf01.dbf' 22 CHARACTER SET UTF8; CREATE CONTROLFILE REUSE DATABASE "SKYREAD" NORESETLOGS FORCE LOGGING ARCHIVELOG * ERROR at line 1: ORA-01503: CREATE CONTROLFILE failed ORA-01565: error in identifying file '/database/oradata/skyread/redo04.log' ORA-27046: file size is not a multiple of logical block size Additional information: 1     SQL> CREATE CONTROLFILE REUSE DATABASE "SKYREAD" RESETLOGS FORCE LOGGING ARCHIVELOG 2 MAXLOGFILES 20 3 MAXLOGMEMBERS 5 4 MAXDATAFILES 1000 5 MAXINSTANCES 8 6 MAXLOGHISTORY 2337 7 LOGFILE 8 GROUP 1 '/database/oradata/skyread/redo01.log' SIZE 512M, 9 GROUP 2 '/database/oradata/skyread/redo02.log' SIZE 512M, 10 GROUP 3 '/database/oradata/skyread/redo03.log' SIZE 512M, 11 GROUP 4 '/database/oradata/skyread/redo04.log' SIZE 512M, 12 GROUP 5 '/database/oradata/skyread/redo05.log' SIZE 512M 13 DATAFILE 14 '/database/oradata/skyread/system01.dbf', 15 '/database/oradata/skyread/tbs_test.dbf', 16 '/database/oradata/skyread/sysaux01.dbf', 17 '/database/oradata/skyread/users01.dbf', 18 '/database/oradata/skyread/system02.dbf', 19 '/database2/oradata/skyread/undotbs02.dbf', 20 '/database2/oradata/skyread/TBS_MRPMUSIC01.dbf', 21 '/database/oradata/skyread/sf01.dbf' 22 CHARACTER SET UTF8;   Control file created. 下面是一系列的打开过程，由于redo04.log是活动的，所以需要恢复 SQL> alter database open; alter database open * ERROR at line 1: ORA-01589: must use RESETLOGS or NORESETLOGS option for database open     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: '/database/oradata/skyread/system01.dbf'     SQL> recover database; ORA-00283: recovery session canceled due to errors ORA-01610: recovery using the BACKUP CONTROLFILE option must be done     SQL> recover database using backup controlfile; ORA-00279: change 122695861946 generated at 06/04/2013 13:48:31 needed for thread 1 ORA-00289: suggestion : /database/oradata/arch/1_34_815416841.dbf ORA-00280: change 122695861946 for thread 1 is in sequence #34     Specify log: {<RET>=suggested | filename | AUTO | CANCEL} /database/oradata/arch/1_34_815416841.dbf ORA-00308: cannot open archived log '/database/oradata/arch/1_34_815416841.dbf' ORA-27037: unable to obtain file status Linux-x86_64 Error: 2: No such file or directory Additional information: 3   应用日志并打开数据库： Specify log: {<RET>=suggested | filename | AUTO | CANCEL} /database/oradata/skyread/redo05.log Log applied. Media recovery complete. SQL> alter database open resetlogs;   Database altered. 如果是未归档的活动在线日志文件损坏，那么需要有数据文件的备份才能恢复，这里不再详细介绍。  

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