links for 2008-02-20

• 
  
  Friends for Sale Architecture - A 300 Million Page View/Month Facebook RoR App | High Scalability
  
  
  (tags: rubyonrails scaling snb)
  
  


• 
  
  Quick Intro to RDF
  
  
  (tags: semanticweb rdf)
  
  


• 
  
  Coding Horror: The Ultimate Unit Test Failure
  
  
  When users can't figure out how to use your app, when users pass over your app in favor of something easier or simpler to use, that's the ultimate unit test failure.
  
  
  (tags: usability design snb)