Chapter 9. Auto Scaling

When we talk about elasticity in AWS, Auto Scaling is one of the services that will be used the most. Auto Scaling is such a beautiful service that every application has a reason to use it, even if there is no need to scale. This is one of the best-in-class features in the cloud, making the cloud even more popular, and is one of the most considered features in cloud migration. In the on-premise world, when there is a need to satisfy the demands of a spiky load, there is nothing you can do to satisfy it unless you have already provisioned the required capacity, irrespective of the demand load. This means we have to always overprovision the capacity to ensure that spiky load is addressed. This results in a big cost problem if your application is gaining popularity exponentially. In a traditional on-premise environment, there is no secret formula for matching demand and capacity when needed. Either you end up provisioning too much compute capacity, or underprovisioning...