Madeleine on Rails

This document discusses a work in progress plugin called Off the Rails that aims to use the Madeleine object database with Ruby on Rails. Madeleine allows objects to live in memory and be serialized to files, providing extremely fast performance if enough RAM is available. Changes are serialized as "command objects" and the overall concept is called "Prevalence," similar to the Java implementation Prevayler. The plugin would integrate Madeleine into Rails by having a single process read from a snapshot file and start the AppService to begin the application.