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There are no hard and fast rules followed for Cloning/Cloning Standards.
They vary from customer to customer. Some customers have only 2 non prod.
Some customers have as many as 7 - 8 non prod.
Ideally, most DEV team has complete access to code in PROD i.e., no apps schema access.
But, for testing, they do have access in non PROD.
Thanks Nasri, our management still insist that there is a standards from oracle that we can follow
I'm still waiting more users answers so the management can review it all.
There are no hard and fast rules on the number of supporting instances. I have seen as few as 5 and as many as 20. Can you clarify your requirement ?
As for Dev access, it is recommended only in Dev instances - all other instances should be locked down for developers.
It all depends on the project. How much customization is there ? What kind of development strategy is being applied? Also number of product being used ?
So it is different everywhere. Most of the time it is like 3 Non-PROD and 1 PROD with DR setup
Thanks Dears. your replies is really helping to take decision.