Ray Summit is now rescheduled for Sept. 30 – October 1, 2020, free and online, a conference that brings together researchers, developers, and engineers interested in building large-scale AI applications centered around Ray, an open-source system for scaling Python applications from single machines to large clusters. The conference has assembled an outstanding slate of tutorials, keynotes, and sessions with notable confirmed keynote speakers including Michael Jordan, Wes McKinney, Azalia Mirhoseini, Manuela Veloso, and Ion Stoica. Scaling applications on clusters is a daunting challenge, but the Ray Summit will showcase tutorials, tools, and best practices from leading companies and research organizations to help machine learning engineers seamlessly scale their ML applications and other Python applications across a cluster.