XtreemOS is a Linux-based operating system providing native support for virtual organizations (VOs) in next-generation grids. Unlike the traditional, middleware-based approaches, it is a prominent goal to provide seamless support for VOs, on all software layers involved, ranging from the operating system of a node, via the VO-global services, up to direct application support. A product based on Mandriva 2008.
Read more at http://wiki.mandriva.com/en/Releases/Mandriva/XtreemOS
Jump right to the XtreemOS home page at http://xtreemos.org/