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Ruby Proxies for Scale and Monitoring from igvita.com

Proxy servers can be placed in numerous places between the user and the destination, they can be chained and they can even alter the data at will. A transparent proxy will not modify the request or response and is commonly used for load balancing, authentication, or validation. On the other hand, an intercepting proxy is often used to modify the request or response to provide some added service to user or architect: transform data on the fly, encryption, extending a protocol, etc. Needless to say, intercepting proxies are a wonderful tool!

Deploy Your Rails Application in 2 Minutes with Heroku by Elijah Miller

Heroku, Instant Ruby Platform. We've been using Heroku's free service for hosting staging servers for a few weeks now. It takes just a moment to setup and it couldn't be any easier to use.

JRuby on Rails on Google App Engine by Ola Bini

go through the steps you need to take to get a JRuby on Rails application working on GAE/J, and also what kind of characteristics you should expect from your application.