Just published a new Scaling Rails screencast, this one covering Rack, Metal, and some of the Rails Middleware internals. By the end of this screencast you should know how to use Metal to help Scale your Rails apps, and how to write Rails Middleware.

Summary

Rails 2.3 now uses the Rack. In this screencast I give a quick introduction to Rack & Rack Middleware. Once we get familiar with the syntax of these libraries we move into a tutorial that walks through the Rails Middleware stack, so that we can gain a better understanding of what middleware can be used for, and how we can use it to help Scale our application. Lastly we learn how to use Rack Metal to take certain actions in your Rails application and make them snappy.

I hope you find these videos useful. Don’t forget to subscribe to the screencast RSS feed or grab it on ITunes to avoid missing any of these episodes. FYI, These videos look great on an iPhone / iPod if you want something to watch on the go.