Twitter open sources its MySQL secret sauce | GigaOm
Used by millions of web developers, MySQL is hugely popular; it’s the “M” in the LAMP stack that still underpins many web applications. But it has its problems, among them scalability and performance under the pressure of high transaction rates. This is part of the reason that NoSQL databases came into existence and continue to flourish. So, for anyone concerned with making MySQL scale, being able to see and build upon what a site like Twitter did with the code should be a big deal.