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';”
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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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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。
SQL>alter database backup control file to trace
在alert log中可以看到trace的文件名
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';”
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
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。
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。
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