Upgrade journey to R12

Well at the beginning I though it will be a difficult task but when you get in to it, you will find out that it's kind of clear task so far ;-)

My plan was to clone my production system to a new server just for the upgrade purpose so I had to do a cloning from multi-node to single node based on note 233428.1 and of course with a great help from sam's post (Multi Node to Single Node Cloning) thank you sam.

After that I started the upgrade journey to R12 I just finished the Database upgrade path acutely I am running the utlrp.sql script while I am writing this post, every thing is clear so far.
I will keep you posted in case of any issue and incase I reach the R12 successfully or not (I hope I will).

I need to major the time needed to do the upgrade and to know if there any issues, my next step will be the upgrade to R12 on my Test servers.

Fadi