title: Is Redis just a cache?
body: <p>I have been reading some Redis docs and trying the tutorial at <a href="http://try.redis-db.com/">http://try.redis-db.com/</a>. So far, I can't see any difference between Redis and caching technologies like Velocity or the Enterprise Library Caching Framework</p>
  
  <p>You're effectively just adding objects to an in-memory data store using a unique key. There do not seem to be any relational semantics...</p>
  
  <p>What am I missing?</p>