Sometimes it is required having several clones of the same database running on the same server. That was simple to do when the database was based on File System, and is still simple to do with the help of Rman.
But there are very large databases, which are usually cloned using storage tools like bcv, srdf or snapshots that cannot consider Rman as a viable possibility.
For these databases there is the possibility to implement the procedure we will test on this lab.
Note that the rename disk group script has not been made public.
The rename disk group functionality is available on 11g R2 that was made available to the general public on August 2009.
These are the steps required to complete the process:
1. Prepare a set of storage devices with enough space to hold a copy of the diskgroup to be copied
2. Shutdown the source database
3. Make a bit by bit copy of the source database on the target devices
4. Add kfed path to the path of user root
5. Execute the rename diskgroup script
6. Rename ASM disks of the cloned devices
7. Rescan ASM disks
8. Start the ASM instance and mount the new diskgroup
9. Recreate the controlfile and rename the database based on the cloned diskgroup
10.Open the clone with the resetlogs option
Details on this file:
Cloning Disk Group
