An Overview of App Engine
An explanation of App Engine services, the building blocks of App Engine applications.
The Ruby Flexible Environment
A description of the Ruby flexible environment for App Engine and how it works.
How Requests are Routed
How HTTP requests from users and other applications can be routed using dispatch files.
How Requests are Handled
How requests to your application are understood and handled within App Engine.
How Instances are Managed
How Google manages the health checks, uptime, restarts, and location of your instances.