Realglobe provides an auto-scaling cloud platform for the application developers. Using our cloud platform named “C4SA” (Cloud for Scalable Applications), application developers can build, deploy, run and manage their applications on the cloud without worrying about the configuration of the servers. C4SA provides a real-time auto-scaling by automatically adjusting the number of distributed servers allocated to run the cloud application depending on its traffic. Users do not need to setup any complicated parameters and can immediately start using C4SA. Using the C4SA platform, users can save the running cost since they need to pay only for the computation power they actually used. C4SA is especially suitable for building services such as social application services or event promotion services since the traffic of these applications are usually highly unpredictable at the time of starting the services.