本文共 6001 字，大约阅读时间需要 20 分钟。
最近遇到一个很有意思的问题，在RMAN中手动配置一条信息，但是由于笔误，错误的增加一行“FOR DEVICE TYPE 'DISK' TO 'AA_auto_control_expire_backup_%F.ctl';”
但是希望删除的过程，遇到了问题，通过各种clear的方式，都不能成功删除，怀疑是oracle的一个小bug
1. 笔误之后的结果
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ RMAN> show all ; 使用目标数据库控制文件替代恢复目录 db_unique_name 为 ORCL 的数据库的 RMAN 配置参数为: CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default CONFIGURE BACKUP OPTIMIZATION OFF ; # default CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default CONFIGURE CONTROLFILE AUTOBACKUP OFF ; CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'DISK' TO 'AA_auto_control_expire_backup_%F.ctl' ; CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F' ; # default CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT 'clear' ; CONFIGURE MAXSETSIZE TO UNLIMITED; # default CONFIGURE ENCRYPTION FOR DATABASE OFF ; # default CONFIGURE ENCRYPTION ALGORITHM 'AES128' ; # default CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'C:\APP\XIAOLXU\PRODUCT\11.2.0\DBHOME_2\DATABASE\SNCFORCL.ORA' ; # default |
2. 在无法删除之后，想到RMAN的信息是记录在control file中，dump一个trace看看。
| 1 | SQL> alter database backup control file to trace |
在alert log中可以看到trace的文件名
| 1 2 3 4 5 | Wed Jun 29 16:48:14 2016 CJQ0 started with pid=28, OS id=16764 alter database backup controlfile to trace Backup controlfile written to trace file C:\APP\XIAOLXU\diag\rdbms\orcl\orcl\trace\orcl_ora_6304.trc Completed: alter database backup controlfile to trace |
3. trace内容如下, 可以看到对应的记录信息
“FOR DEVICE TYPE 'DISK' TO 'AA_auto_control_expire_backup_%F.ctl';”
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | STARTUP NOMOUNT CREATE CONTROLFILE REUSE DATABASE "ORCL" RESETLOGS ARCHIVELOG MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 100 MAXINSTANCES 8 MAXLOGHISTORY 292 LOGFILE GROUP 1 'C:\APP\XIAOLXU\ORADATA\ORCL\REDO01.LOG' SIZE 50M BLOCKSIZE 512, GROUP 2 'C:\APP\XIAOLXU\ORADATA\ORCL\REDO02.LOG' SIZE 50M BLOCKSIZE 512, GROUP 3 'C:\APP\XIAOLXU\ORADATA\ORCL\REDO03.LOG' SIZE 50M BLOCKSIZE 512 -- STANDBY LOGFILE DATAFILE 'C:\APP\XIAOLXU\ORADATA\ORCL\SYSTEM01.DBF' , 'C:\APP\XIAOLXU\ORADATA\ORCL\SYSAUX01.DBF' , 'C:\APP\XIAOLXU\ORADATA\ORCL\UNDOTBS01.DBF' , 'C:\APP\XIAOLXU\ORADATA\USERTEST.DBF' CHARACTER SET AL32UTF8 ; -- Configure RMAN configuration record 1 VARIABLE RECNO NUMBER; EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG( 'CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE' , '' 'DISK' ' TO ' 'AA_auto_control_expire_backup_%F.ctl' '' ); <<<<<<<< -- Configure RMAN configuration record 2 VARIABLE RECNO NUMBER; EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG( 'CHANNEL' , 'DEVICE TYPE DISK FORMAT ' 'clear' '' ); -- Configure RMAN configuration record 3 VARIABLE RECNO NUMBER; EXECUTE :RECNO := SYS.DBMS_BACKUP_RESTORE.SETCONFIG( 'CONTROLFILE AUTOBACKUP' , 'OFF' ); -- Commands to re-create incarnation table -- Below log names MUST be changed to existing filenames on -- disk. Any one log file from each branch can be used to -- re-create incarnation records. -- ALTER DATABASE REGISTER LOGFILE 'C:\APP\XIAOLXU\PRODUCT\11.2.0\DBHOME_2\RDBMS\ARC0000000001_0898420407.0001'; -- Recovery is required if any of the datafiles are restored backups, -- or if the last shutdown was not normal or immediate. RECOVER DATABASE USING BACKUP CONTROLFILE -- Database can now be opened zeroing the online logs. ALTER DATABASE OPEN RESETLOGS; -- Commands to add tempfiles to temporary tablespaces. -- Online tempfiles have complete space information. -- Other tempfiles may require adjustment. ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APP\XIAOLXU\ORADATA\ORCL\TEMP01.DBF' SIZE 60817408 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; -- End of tempfile additions. -- |
4. 使用下面命令重建控制文件
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | STARTUP NOMOUNT CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS ARCHIVELOG MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 100 MAXINSTANCES 8 MAXLOGHISTORY 292 LOGFILE GROUP 1 'C:\APP\XIAOLXU\ORADATA\ORCL\REDO01.LOG' SIZE 50M BLOCKSIZE 512, GROUP 2 'C:\APP\XIAOLXU\ORADATA\ORCL\REDO02.LOG' SIZE 50M BLOCKSIZE 512, GROUP 3 'C:\APP\XIAOLXU\ORADATA\ORCL\REDO03.LOG' SIZE 50M BLOCKSIZE 512 -- STANDBY LOGFILE DATAFILE 'C:\APP\XIAOLXU\ORADATA\ORCL\SYSTEM01.DBF' , 'C:\APP\XIAOLXU\ORADATA\ORCL\SYSAUX01.DBF' , 'C:\APP\XIAOLXU\ORADATA\ORCL\UNDOTBS01.DBF' , 'C:\APP\XIAOLXU\ORADATA\USERTEST.DBF' CHARACTER SET AL32UTF8 |
5. 重建完成之后，这条信息就被删除掉了。
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | RMAN> show all ; 使用目标数据库控制文件替代恢复目录 db_unique_name 为 ORCL 的数据库的 RMAN 配置参数为: CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default CONFIGURE BACKUP OPTIMIZATION OFF ; # default CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default CONFIGURE CONTROLFILE AUTOBACKUP OFF ; # default CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F' ; # default CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default CONFIGURE MAXSETSIZE TO UNLIMITED; # default CONFIGURE ENCRYPTION FOR DATABASE OFF ; # default CONFIGURE ENCRYPTION ALGORITHM 'AES128' ; # default CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default CONFIGURE SNAPSHOT CONTROLFILE NAME TO 'C:\APP\XIAOLXU\PRODUCT\11.2.0\DBHOME_2\DATABASE\SNCFORCL.ORA' ; # default |
6. 同理，如果有之前的control file备份，restore一个，问题也是可以解决的。
注意，以上是测试步骤，重建控制文件之后，还有些后续工作，register archive log，recover database还是需要做的。生产环境要慎重。