title: How would you migrate a multi-site ClearCase/ClearQuest environment to all Open Source?
body: <p>I work in an multi-site environment that's currently using Rational ClearCase for source control and Rational ClearQuest for issue tracking (I accept your condolences ahead of time).  As a rough estimate I would say this is supporting 200 engineers.</p>
  
  <p>How would you effectively migrate this SCM methodology to a comparative, all Open Source tool suite?  Not only would this save literally hundreds of thousands of dollars but I also believe it would improve developer productivity and very little downtime compared to the current system.</p>
  
  <p>Platforms in use include Windows, Linux, UNIX and Solaris.</p>