Both Memcached, which accelerates existing relational databases like MySQL, and Redis, which is a complete, stand-alone database and acceleration solution, are open source technologies.
For one thing, it says, MySQL and Oracle's databases do not compete: the former is a relatively simple program used by many websites, while the latter is complex software that underpins corporate applications.
Last December ten times as many came and on the stage were plenty of Europeans, including Marten Mickos of MySQL, a maker of databases now owned by Oracle, a software giant, Marc Simoncini, founder of meetic.com, Europe's largest dating site, and Niklas Zennstrom, who started Skype.