title: how to run background job in rails 3
body: <p>I have a small application that I would like to host on Heroku. All the application do is log in to a remote server every 5 minutes to get a file and analyze it.</p>
  
  <p>I am using rails3 and wondering how can I make it run background job like this.</p>
  
  <p>Any suggestion is appreciated.</p>
  
  <p>Thanks,
  David</p>