For every high performance website that gets hammered by a decent traffic volume, some sort of caching mechanism is essential and Drupal is no exception.  The Drupal caching approach, to a great extent, depends upon the type of visitors who frequent the website and this suggests different Drupal specific caching techniques depending upon the type of visitors to the website; for instance if the predominant visitors to the website are authenticated users versus unauthenticated.  So in this blog, I’d like to discuss Varnish as a caching option for...