mixi is considered one of the hottest web properties in Japan, currently ranked #50 (worldwide) in the Alexa page view ranking. Since its launch in February 2004, membership now exceeds 3.1 million, with the speed of growth exponentially faster than Yahoo! Japan.

mixi has an estimated 150 million daily page views with more than 400 million MySQL DB queries.

The secret of mixi's success is its community members -- mixi cannot be joined without a registered member's invitation. About 10,000 people register to join every day.

Login ratio of the mixi is extremely high. About 70% of the members visit mixi once every three days. The average page view per person for one visit estimates around 50-60, all dynamically generated pages.

The presentation will explain about mixi's large scale-out web architecture and go in-depth discussing the use of commodity hardware and open source software, especially MySQL.