This module provides static page caching for Drupal enabling a very significant performance and scalability boost for heavily-trafficked Drupal sites that receive mostly anonymous traffic.
Setting up the Boost module to create static html pages of anonymous Drupal page views, then serving them from a completely different machine.
Memcached is a caching daemon designed especially for
dynamic web applications to decrease database load by
storing objects in memory.
Cache actions provides rules actions for clearing drupal caches.
