What database does facebook use?

To date, Facebook has achieved more than a 6x reduction in CPU utilization for the site using HipHop as compared with Apache and Zend PHP.Facebook is able to move fast and maintain a high number of engineers who are able to work across the entire codebase. read more

Like Google they use mysql, but haven't built a suite of proprietary database tools around it. Facebook cares more about speed than volume so it focuses on server scripting (Hax and HipHop) and caching. read more

What database does Facebook use is one of the most common questions asked when folks start taking about what database is the most scalable for large scale web applications. In fact, it is usually a person who is an open source proponent, and knows very well that Facebook uses MySQL as their core database engine. read more