Below steps helps you in performing database cloning using hot backup
1. directory structure is different in both source and target servers
2. Oracle version : 10.2.0.5
3. OS version : Linux 5
4. target database name is same as source database name
5. DATABASE SHOULD BE IN ARCHIVEMODE
step 1 : Take the hot backup of source database
If the souce database in not in Archivemode, alter database to archivemode.
SQL> STARTUP MOUNT; SQL> ALTER DATABASE ARCHIVELOG; SQL> ALTER DATABASE OPEN; sql> alter database begin backup; $ copy datafiles to backup location sql> alter database end backup;
step 2 : Take controlfile trace and pfile or spfile (that was using by the source database)
step 3 : Install Oracle software on another machine (choose “Install only” option in OUI). Don’t create any database
step 4 : Copy all the files (including trace file and pfile or spfile) from source server to target server either using FTP or rcp
Note: Not necessary in copying control files and redologfiles
step 5 : Place pfile or spfile in “dbs” directory on target
step 6 : Copy the remaining files to their respective locations (If any directories are missing, do create them)
step 7 : Connect as sysdba and Startup the database in nomount stage
step 8 : Edit the trace file (that was copied) and generate a create controlfile script from it.
Modify the script and specify the new locations of the files.
step 9 : Execute the controlfile script which will create controlfiles in the location specified in CONTROL_FILES parameter.
Once control files are created, database will be forwarded to MOUNT state.
sql> @create_controlfile.sql step 10 : Finally, Open the database with resetlogs option sql> startup nomount sql> alter database mount; sql> recover database using backup controlfile until cancel; sql> alter database open resetlogs;