All SLING clusters support ARC middleware.
SLING users need an X.509 certificate to authenticate. Certificate request can be submitted on the Slovenian Certificate Authority SiGNET, member of EUGridPMA. Authorization of the user is done via VO management system. A user can be a member of one or more VOs.
The VO gen.vo.sling.si is supported on all clusters in the SLING network, so SLING users are entitled to submit jobs to all SLING clusters using this VOs.
Users can also join international VOs, based on the project that they are working on or their field of research. The list of the available VOs within the EGI, can be found here.