WebScaleSQL is an open-source project aimed at enhancing the performance and scalability of MySQL, specifically tailored for large-scale deployments. It is a collaboration among engineers from several major technology companies, including Facebook, Google, LinkedIn, and Twitter, all of whom have significant operational experience with MySQL in extensive environments. The project focuses on harnessing the power of MySQL with improvements and extensions that address the needs of web applications at a large scale. Up-to-date information, resources, and documentation about WebScaleSQL can be found on their official website at http://webscalesql.org.