And you are here why?

So you’re going to revolutionize ice-cream delivery, through the powers of your iOS/Android app. ( Work with me here. Pretend that you’ve actually invented a better mouse-trap ) Your back-end runs on an AWS/EC2 instance, which is fine while you’re developing, but as you start thinking about real live customers,  reliability  comes to mind, and you split the back-end up so that it’s running on  TWO  AWS/EC2 instances. Great, right? If one goes down, the other takes over the load, and everything is hunky dory (as long as you the combined load is less than the capacity of any one of the servers, but let’s ignore that for now). Except, what if  AWS itself goes down ? As  June 29, 2012  taught a lot of us, the un-imagineable  does  happen every now and then. The solution, of course, is to deploy your instances across multiple availability zones, or maybe even multiple regions, or heck, while you’re at it, across multiple cloud providers....