For one client I have created a Wowza instance on AWS/EC2 that is 24/7/365. Works GREAT.
For another client, I need an instance only four days per month - - they are streaming video only for special events four times per month.
I believe that if you stop an instance, and then a week later restart it, that Amazon re-assigns the resources, and that the address would change.
Does anyone have experience with this situation?