I need your help about scalability on Amazon EC2 instanced. I have developed a web application using asp.net. I have decided that for start, I want to deploy it on a Medium High-CPU Windows Server 2008 instance.
I have problem understanding what is Amazon Elastic Compute Cloud and what is CloudWatch Autoscaling and what each one does?
My target: I want that when CPU utilization exceeds some kind of a limit, I want that Amazon will automatically create a duplicated instance (EC2 + EBS) from the current server and divide the visits between those two servers. When the stress is low, I want Amazon to terminate those instanced that were created in order to give more computing power when the application needs it.
Other then that, I want to know that if I choose to go with High CPU medium instance, what are my upgrading options. I use EC2 + EBS and I thought it would be easy to duplicate the EBS (create a snapshot), launch a new instance (more powerful one), attach the EBS and assign the elastic IP to the new server. Of course I don't know how it all adds up when Amazon scales the servers and when I can apply it.
The most important thing is that my application won't crash if many users visits my website, that's the most important part.
I really need your help on this. Many thanks.