Clone Oracle Database Steps

SQL>alter database backup controlfile to trace;

STARTUP NOMOUNT
CREATE CONTROLFILE REUSE DATABASE “OLDLSQ” NORESETLOGS
NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 2
MAXDATAFILES 240
MAXINSTANCES 1
MAXLOGHISTORY 113
LOGFILE
GROUP 1 (‘/u01/oradata/oldlsq/log1a.dbf’,
‘/u01/oradata/olslsq/log1b.dbf’) SIZE 30M,
GROUP 2 (‘/u01/oradata/oldlsq/log2a.dbf’,
‘/u01/oradata/oldlsq/log2b.dbf’) SIZE 30M
DATAFILE
‘/u01/oradata/oldlsq/system01.dbf’,
‘/u01/oradata/oldlsq/mydatabase.dbf’
;
# Recovery is required if any of the datafiles are restored
# backups, or if the last shutdown was not normal or immediate.
RECOVER DATABASE
# Database can now be opened normally.
ALTER DATABASE OPEN;

 

SQL>Shutdown immediate ;

Step-3 : Copy and Edit the Control file – Using the output syntax from STEP 1, modify the controlfile creation script by changing the following: 

CREATE CONTROLFILE REUSE DATABASE “OLDLSQ” NORESETLOGS

CREATE CONTROLFILE SET DATABASE “NEWLSQ” RESETLOGS

 Step-4 :Remove the “recover database” and “alter database open” syntax 


Step-5:Re-names of the data files location to new clone location in a dbclone_controlfile_creation.sql.

Old:

DATAFILE
‘/u01/oradata/oldlsq/system01.dbf’,
‘/u01/oradata/oldlsq/mydatabase.dbf’

New:

DATAFILE
‘/u01/oradata/newlsq/system01.dbf’,
‘/u01/oradata/newlsq/mydatabase.dbf’

Step-6: Copy all data files into the new directories on the new server. You may change the file names if you want, but you must edit the controlfile to reflect the new data files names on the new server.

Step-7 : Create the bdump, udump and cdump directories
  

 cd /u01/admin/
mkdir newlsq
cd newlsq
mkdir bdump
mkdir udump
mkdir cdump
mkdir pfile

Step-8 : Copy-over the old init.ora file 


open the primary database pfile in a notepad or text editor and change the udump,bdump,pfile,controlfile destination and save it in new clone pfile location newlsq folder and save as newlsq.ora 
eg: primary database location /u01/admin/oldlsq/pfile/oldlsq.ora
open that oldlsq.ora file in a text editor or notepad and change the required destinations cdump,udump,bdump,controlfile destinations and save as newlsq.ora in the below destination
/u01/admin/newlsq/pfile/newlsq.ora

Step-9 : Start the new database

SQL>startup nomount pfile=’ /u01/admin/newlsq/pfile/newlsq.ora ‘ ;

SQL> @dbclone_controlfile_creation.sql

SQL>alter database open resetlogs;

SQL>create spfile from pfile;

 Step-10 : Place the new database in archivelog mode.




Thank you 
osama mustafa