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oracle 控制文件

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database backup controlfile to ‘file_name‘; 
2.备份controlfile到trace file

    alter database backup controlfile to trace;  
 trace file在alert log中记录也可在ORACLE_BASE/diag/rdbms/sid/sid/trace中查找
 3.在RMAN中配置controlfile自动备份

RMAN> show all;

RMAN configuration parameters for database with db_unique_name OEM are:
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 ‘/u01/app/oracle/product/11.2.0/db_1/dbs/snapcf_oem.f‘; # default

RMAN> configure controlfile autobackup on;

new RMAN configuration parameters:
CONFIGURE CONTROLFILE AUTOBACKUP ON;
new RMAN configuration parameters are successfully stored

RMAN> show all;

RMAN configuration parameters for database with db_unique_name OEM are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP ON;
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 ‘/u01/app/oracle/product/11.2.0/db_1/dbs/snapcf_oem.f‘; # default

RMAN>

通过备份控制文件到race file中，创建控制文件的命令如下：

CREATE CONTROLFILE REUSE DATABASE "OEM" RESETLOGS  ARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
LOGFILE
  GROUP 1 ‘/u01/app/oracle/oradata/oem/redo01.log‘  SIZE 512M BLOCKSIZE 512,
  GROUP 2 ‘/u01/app/oracle/oradata/oem/redo02.log‘  SIZE 512M BLOCKSIZE 512,
  GROUP 3 ‘/u01/app/oracle/oradata/oem/redo03.log‘  SIZE 512M BLOCKSIZE 512
-- STANDBY LOGFILE
DATAFILE
  ‘/u01/app/oracle/oradata/oem/system01.dbf‘,
  ‘/u01/app/oracle/oradata/oem/sysaux01.dbf‘,
  ‘/u01/app/oracle/oradata/oem/undotbs01.dbf‘,
  ‘/u01/app/oracle/oradata/oem/users01.dbf‘,
  ‘/u01/app/oracle/oradata/oem/mgmt_ecm_depot1.dbf‘,
  ‘/u01/app/oracle/oradata/oem/mgmt.dbf‘,
  ‘/u01/app/oracle/oradata/oem/mgmt_deepdive.dbf‘,
  ‘/u01/app/oracle/oradata/oem/test0101.dbf
‘
CHARACTER SET AL32UTF8
;

在控制文件损坏时，可以通过备份的控制文件恢复。

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oracle 控制文件

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