------------------------------------------------------------------------ ROADS'09 Title: 4th International Workshop on Real Overlays and Distributed Systems Submission Deadline: June 15, 2009 Webpage: http://roads.mytestbed.net Dates: October, 14, 2009 Location: Big Sky, MT, USA Contact Email: roads-sosp09@sophia.inria.fr Synopsis: The ROADS workshop goal is to bring together people exploring challenges in building widely distributed networked systems with those building global-scale facilities to enable research on future communication networks, with an emphasis on systems that run on real networks, providing real services to real users. For this workshop we especially welcome papers that explore the interaction between simulation (e.g., ModelNet or ns-3), emulation (e.g., Emulab), and more realistic deployment settings (e.g., PlanetLab) to better predict performance or architectural bottlenecks when scaling up distributed service on experimental environments.