Oracle | Control Files

Oracle Control Files Version 21c

General Information

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Current Control Files (File System) conn / as sysdba col value format a105 col "control file name" format a65 SELECT value FROM gv$parameter WHERE name = 'control_files'; VALUE -------------------------------------------------------------- /u01/orabase21/oradata/orabase21/control.ctl, /u01/orabase21/fast_recovery_area/orabase21/control02.ctl SELECT RPAD(SUBSTR(name, 1, 60), 61,' ') "CONTROL FILE NAME" FROM gv$controlfile; CONTROL FILE NAME --------------------------------------------------------- /u01/orabase21/oradata/orabase21/control01.ctl /u01/orabase21/fast_recovery_area/orabase21/control02.ctl

Current Control Files (ASM) conn / as sysdba col value format a20 SELECT value FROM gv$parameter WHERE name = 'control_files'; VALUE -------------------- +DATA, +RECO

Data Dictionary Objects

V$CONTROLFILE

V$CONTROLFILE_RECORD_SECTION

X$KCCCF

Create Control File

Reuse previously existing control file(s) if they exist CREATE CONTROLFILE [REUSE] DATABASE <database_name> <RESETLOGS | NORESETLOGS>;

conn / as sysdba

      

      STARTUP NOMOUNT;

      

      CREATE CONTROFILE REUSE

      SET DATABASE orabase

      RESETLOGS;

      

      ALTER DATABASE OPEN RESETLOGS;

Reuse previously existing control file(s) if they exist but do not perform a logfile reset CREATE CONTROLFILE [REUSE] DATABASE <database_name> <RESETLOGS | NORESETLOGS>;

conn / as sysdba

      

      STARTUP NOMOUNT;

      

      CREATE CONTROFILE REUSE

      SET DATABASE orabase

      NORESETLOGS;

Alter Control File

Change Control File Keep Time ALTER SYSTEM SET control_file_record_keep_time=<integer> SCOPE=BOTH;

ALTER SYSTEM SET 
      control_file_record_keep_time=32 SCOPE=BOTH;

Create Standby Control File

Create Control File For Logical Standby (issue on the primary database) ALTER DATABASE CREATE LOGICAL STANDBY CONTROLFILE AS <file_name> REUSE;

ALTER DATABASE CREATE LOGICAL STANDBY CONTROLFILE

      AS '/u06/oragrid/control03.ctl';

Create Control File For Physical Standby (issue on the primary database) ALTER DATABASE CREATE PHYSICAL STANDBY CONTROLFILE AS <file_name> REUSE;

ALTER DATABASE CREATE PHYSICAL STANDBY CONTROLFILE

      AS '/u06oragrid/control03.ctl' REUSE;

To put the standby control file on the standby with ASM SQL> startup nomount; RMAN> connect target / RMAN> restore controlfile to �+DATA01/ORADB01/controlfile/<new_control_file';s_name>′ FROM /usr/tmp/oradb01.<file_name>.ctl; -- repeat the RMAN command for all other control file copies substituting the real names for the tags above

Relocate Control Files

Change Control File Location conn / as sysdba SQL> show parameter control SQL> shutdown immediate SQL> create pfile from spfile; SQL> host -- use cp to copy the control file from its current location to the new location $ cp $ORACLE_BASE/oradata/orabase/control02.ctl /u02/oradata/orabase/control02.ctl $ vi $ORACLE_HOME/dbs/initorabase.ora -- change the control file location to the new location save the changes and exit vi $ exit SQL> create spfile from pfile; startup show parameter control host -- remove the copy of the control file in the original location $ rm $ORACLE_BASE/oradata/orabase/control02.ctl

Backup Control Files

Backup Control File To Text File ALTER DATABASE BACKUP CONTROLFILE TO TRACE AS <file_name> REUSE <RESETLOGS | NORESETLOGS>;

ALTER DATABASE  BACKUP CONTROLFILE TO TRACE;

      

      ALTER DATABASE BACKUP CONTROLFILE TO TRACE AS 'c:\temp\control.bkp';

      

      ALTER DATABASE BACKUP CONTROLFILE TO TRACE AS '/u01/control.bkp' REUSE;

      

      ALTER DATABASE BACKUP CONTROLFILE TO TRACE AS 'c:\temp\control01.ctl' NORESETLOGS;

Backup to Binary File ALTER DATABASE BACKUP CONTROLFILE TO '/u01/oradata/control.bkp'; ALTER DATABASE BACKUP CONTROLFILE TO 'c:\temp\control.bkp' REUSE;

Sample Backup Control File To Trace Script Output -- The following are current System-scope REDO Log Archival related -- parameters and can be included in the database initialization file. -- -- LOG_ARCHIVE_DEST='' -- LOG_ARCHIVE_DUPLEX_DEST='' -- -- LOG_ARCHIVE_FORMAT=ARC%S_%R.%T -- -- DB_UNIQUE_NAME="orabase198" -- -- LOG_ARCHIVE_CONFIG='SEND, RECEIVE, NODG_CONFIG' -- LOG_ARCHIVE_MAX_PROCESSES=4 -- STANDBY_FILE_MANAGEMENT=MANUAL -- FAL_CLIENT='' -- FAL_SERVER='' -- -- LOG_ARCHIVE_DEST_1='LOCATION=USE_DB_RECOVERY_FILE_DEST' -- LOG_ARCHIVE_DEST_1='MANDATORY REOPEN=300 NODELAY' -- LOG_ARCHIVE_DEST_1='ARCH NOAFFIRM NOVERIFY SYNC' -- LOG_ARCHIVE_DEST_1='NOREGISTER' -- LOG_ARCHIVE_DEST_1='NOALTERNATE' -- LOG_ARCHIVE_DEST_1='NODEPENDENCY' -- LOG_ARCHIVE_DEST_1='NOMAX_FAILURE NOQUOTA_SIZE NOQUOTA_USED NODB_UNIQUE_NAME' -- LOG_ARCHIVE_DEST_1='VALID_FOR=(PRIMARY_ROLE,ONLINE_LOGFILES)' -- LOG_ARCHIVE_DEST_STATE_1=ENABLE -- -- Below are two sets of SQL statements, each of which creates a new -- control file and uses it to open the database. The first set opens -- the database with the NORESETLOGS option and should be used only if -- the current versions of all online logs are available. The second -- set opens the database with the RESETLOGS option and should be used -- if online logs are unavailable. -- The appropriate set of statements can be copied from the trace into -- a script file, edited as necessary, and executed when there is a -- need to re-create the control file. -- -- Set #1. NORESETLOGS case -- -- The following commands will create a new control file and use it -- to open the database. -- Data used by Recovery Manager will be lost. -- Additional logs may be required for media recovery of offline -- Use this only if the current versions of all online logs are -- available. -- After mounting the created controlfile, the following SQL -- statement will place the database in the appropriate -- protection mode: -- ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE STARTUP NOMOUNT CREATE CONTROLFILE REUSE DATABASE "ORABASE1" NORESETLOGS FORCE LOGGING ARCHIVELOG MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 1024 MAXINSTANCES 8 MAXLOGHISTORY 292 LOGFILE GROUP 1 'C:\APPS19\ORADATA\ORABASE18\REDO01.LOG' SIZE 200M BLOCKSIZE 512, GROUP 2 'C:\APPS19\ORADATA\ORABASE18\REDO02.LOG' SIZE 200M BLOCKSIZE 512, GROUP 3 'C:\APPS19\ORADATA\ORABASE18\REDO03.LOG' SIZE 200M BLOCKSIZE 512 -- STANDBY LOGFILE DATAFILE 'C:\APPS19\ORADATA\ORABASE19\SYSTEM01.DBF', 'C:\APPS19\ORADATA\ORABASE19\SYSAUX01.DBF', 'C:\APPS19\ORADATA\ORABASE19\UNDOTBS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\SYSTEM01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\SYSAUX01.DBF', 'C:\APPS19\ORADATA\ORABASE19\USERS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\UNDOTBS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\SYSTEM01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\SYSAUX01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\UNDOTBS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\USERS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\UWDATA.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\EXAMPLE01.DBF', 'C:\APPS19\ORADATA\ORABASE19\EXAMPLE01.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 ''%F'''); -- 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:\APPS19\RECOVERY_AREA\ORABASE19\ARCHIVELOG\2019_01_22\O1_MF_1_1_%U_.ARC'; -- ALTER DATABASE REGISTER LOGFILE 'C:\APPS19\RECOVERY_AREA\ORABASE19\ARCHIVELOG\2019_01_22\O1_MF_1_1_%U_.ARC'; -- Recovery is required if any of the datafiles are restored backups, -- or if the last shutdown was not normal or immediate. RECOVER DATABASE -- Set Database Guard and/or Supplemental Logging ALTER DATABASE ADD SUPPLEMENTAL LOG DATA; -- All logs need archiving and a log switch is needed. ALTER SYSTEM ARCHIVE LOG ALL; -- Database can now be opened normally. ALTER DATABASE OPEN; -- Open all the PDBs. ALTER PLUGGABLE DATABASE ALL OPEN; -- Commands to add tempfiles to temporary tablespaces. -- Online tempfiles have complete space information. -- Other tempfiles may require adjustment. ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APPS19\ORADATA\ORABASE19\TEMP01.DBF' SIZE 135266304 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; ALTER SESSION SET CONTAINER = PDB$SEED; ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\TEMP012019-11-01_10-38-13-442-AM.DBF' SIZE 65011712 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; ALTER SESSION SET CONTAINER = PDBDEV; ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\TEMP01.DBF' SIZE 135266304 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; ALTER SESSION SET CONTAINER = CDB$ROOT; -- End of tempfile additions. -- -- Set #2. RESETLOGS case -- -- The following commands will create a new control file and use it -- to open the database. -- Data used by Recovery Manager will be lost. -- The contents of online logs will be lost and all backups will -- be invalidated. Use this only if online logs are damaged. -- After mounting the created controlfile, the following SQL -- statement will place the database in the appropriate -- protection mode: -- ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE STARTUP NOMOUNT CREATE CONTROLFILE REUSE DATABASE "ORABASE1" RESETLOGS FORCE LOGGING ARCHIVELOG MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 1024 MAXINSTANCES 8 MAXLOGHISTORY 292 LOGFILE GROUP 1 'C:\APPS19\ORADATA\ORABASE19\REDO01.LOG' SIZE 200M BLOCKSIZE 512, GROUP 2 'C:\APPS19\ORADATA\ORABASE19\REDO02.LOG' SIZE 200M BLOCKSIZE 512, GROUP 3 'C:\APPS19\ORADATA\ORABASE19\REDO03.LOG' SIZE 200M BLOCKSIZE 512 -- STANDBY LOGFILE DATAFILE 'C:\APPS19\ORADATA\ORABASE19\SYSTEM01.DBF', 'C:\APPS19\ORADATA\ORABASE19\SYSAUX01.DBF', 'C:\APPS19\ORADATA\ORABASE19\UNDOTBS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\SYSTEM01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\SYSAUX01.DBF', 'C:\APPS19\ORADATA\ORABASE19\USERS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\UNDOTBS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\SYSTEM01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\SYSAUX01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\UNDOTBS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\USERS01.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\UWDATA.DBF', 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\EXAMPLE01.DBF', 'C:\APPS19\ORADATA\ORABASE19\EXAMPLE01.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 ''%F'''); -- 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:\APPS19\RECOVERY_AREA\ORABASE19\ARCHIVELOG\2019_01_22\O1_MF_1_1_%U_.ARC'; -- ALTER DATABASE REGISTER LOGFILE 'C:\APPS19\RECOVERY_AREA\ORABASE19\ARCHIVELOG\2019_01_22\O1_MF_1_1_%U_.ARC'; -- 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 -- Set Database Guard and/or Supplemental Logging ALTER DATABASE ADD SUPPLEMENTAL LOG DATA; -- Database can now be opened zeroing the online logs. ALTER DATABASE OPEN RESETLOGS; -- Open all the PDBs. ALTER PLUGGABLE DATABASE ALL OPEN; -- Commands to add tempfiles to temporary tablespaces. -- Online tempfiles have complete space information. -- Other tempfiles may require adjustment. ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APPS19\ORADATA\ORABASE19\TEMP01.DBF' SIZE 135266304 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; ALTER SESSION SET CONTAINER = PDB$SEED; ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APPS19\ORADATA\ORABASE19\PDBSEED\TEMP012019-11-01_10-38-13-442-AM.DBF' SIZE 65011712 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; ALTER SESSION SET CONTAINER = PDBDEV; ALTER TABLESPACE TEMP ADD TEMPFILE 'C:\APPS19\ORADATA\ORABASE19\PDBDEV\TEMP01.DBF' SIZE 135266304 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M; ALTER SESSION SET CONTAINER = CDB$ROOT; -- End of tempfile additions.