title: Varnish hit-for-pass means?
body: <p>As Varnish Version 3 has some objects for different operations. </p>
  
  <p>For Example, pass is used when it has to retrieve data from backend. and it uses hit when it finds requesting content in cache. </p>
  
  <p>But I cant understand usage of hit-for-pass. when varnish uses it ? I haven't found any useful material on net which make me clear.   </p>