Catch-All Virtual Organizations - Solution for Heterogeneous and Disperse Grid Users Communities

The virtual organizations form a key concept for seamless utilization of all advanced features of available worldwide grid environments, the EGEE Grid in particular. However, apart from large, well organized user communities there is a substantial, non-trivial activation barrier in adopting grid concept and creating a new VO for small research groups. To minimize this barrier, a so-called “catch-all” virtual organization approach has been implemented. Here we present two successful use cases of catch-all virtual organizations (Virtual Organization for Central Europe and for EUAsia), demonstrating the strengths of this approach, discussing their setups, encountered challenges and suggesting corresponding solutions.