Compatible With Redis or Memcached Protocol We wanted to use the same PHP extension and Drupal Redis (or Memcached) modules, and not have to write and test yet another caching module. Non-Memory Resident Storage We want to reduce the memory foot print of Redis/Memcached, because they both store the entire key/value combinations in memory.
How to load WordPress in a few milliseconds using Redis. Redis is an advanced key-value store. Like memcached on steroids. Everything is in the RAM and you can theoretically reach 100 000 GET per second with Redis. My solution below will cache all the HTML output in Redis and display it without the need to load WordPress.