App Engine
App Engine is a PaaS compute service that provides a managed platform for running applications. When you use App Engine, your focus is on your application and not on the VMs that run the application. Instead of configuring VMs, you specify some basic resource requirements along with your application code, and Google will manage the resources needed to run the code. This means that App Engine users have less to manage, but they also have less control over the compute resources that are used to execute the application.
Like VM instances, applications in App Engine are created within a project.
Structure of an App Engine Application
App Engine applications have a common structure, and they consist of services. Services provide a specific function, like computing sales tax in a retail web application or updating inventory as products are sold on a site. Services have versions, and this allows multiple versions to run at one time. Each version of a service runs on an instance...
