Oracle control file (Control Files)

Control file contains:

Database name

The data file name and location

redo location and name

The current log sequence number

Checkpoint information

rman backup information

 

Create a new control file:

CREATE CONTROLFILE
   SET DATABASE prod
   LOGFILE GROUP 1 ('/u01/oracle/prod/redo01_01.log', 
                    '/u01/oracle/prod/redo01_02.log'),
           GROUP 2 ('/u01/oracle/prod/redo02_01.log', 
                    '/u01/oracle/prod/redo02_02.log'),
           GROUP 3 ('/u01/oracle/prod/redo03_01.log', 
                    '/u01/oracle/prod/redo03_02.log') 
   RESETLOGS
   DATAFILE '/u01/oracle/prod/system01.dbf' SIZE 3M,
            '/u01/oracle/prod/rbs01.dbs' SIZE 5M,
            '/u01/oracle/prod/users01.dbs' SIZE 5M,
            '/u01/oracle/prod/temp01.dbs'SIZE 5M 
   MAXLOGHISTORY 400
   MAXLOGMEMBERS 3
   MAXLOGFILES 50
   MAXDATAFILES 200 
   MAXINSTANCES. 6 
   ARCHIVELOG; 


backup control file :

ALTER DATABASE BACKUP CONTROLFILE TO '/oracle/backup/control.bkp' ; 


control data dictionary file related to the view

View	Description
V$DATABASE	Displays database information from the control file
V$CONTROLFILE	Lists the names of control files
V$CONTROLFILE_RECORD_SECTION	Displays information about control file record sections
V$PARAMETER	Displays the names of control files as specified in the CONTROL_FILESinitialization parameter