Please some one suggest me
1)What is the hardware requirement for upgrading to EHP6/7?
2)What is the procedure step by step?
3)what are the prerequisites we need to follow?
4)Prerequisites for before/after upgrade?
5)What is the main advantage of EHP6/7?
6)How to do this for Production(cluster environment)?
7)How to upgrade to EHP6 step by step?
Please some one suggest me with full details, if any upgrade document is there...please provide me.