We are implementing a Community Cloud architecture based on the Cadabia system. It provides a resource sharing ecosystem without having any security risk to institutions or existing architectures. Our architecture provides a stable and extendable environment for community members without losing the control of their own Cloud. We focus on resource utilization for the entire community. This architecture helps SMEs to acquire resources from each other to handle massive requests beyond the processing limits of their own hardware. It allows community members to define give-and-take policies, especially for a community with common purposes and services.