I always knew the company I work for does cool things with MySQL, but I never knew how far we really have pushed the envelope until I see how much more we push MySQL then the twitters and facebooks of the world. Doing some napkin math I would say our largest cluster of MySQL does about 320 Billion inserts a Day across 80 nodes and some of our nodes can peak at about 200K queries per second ( that would be 16 Million QPS if all the nodes were fully loaded ). Meaning at one of our installs we do the same volume as two facebooks !