title: Redis get key pattern
body: <p>I want to get key matching pattern.</p>
  
  <p>ex) Test:*</p>
  
  <p>I consider Keys command. but Its time complexity is too long. </p>
  
  <p>ex) keys Test: *  => It occurs overhead.</p>
  
  <p>My Redis version is 2.6.16  </p>
  
  <p>There is another way?</p>