The September, 2008 release of Sun xVM Server represented a major stepping up of Sun's virtualization game. Sun now has a portfolio of enterprise virtualization products to compete with offerings from market leading VMware as well as other Xen-based alternatives such as Citrix XenServer and Virtual Iron. The competition, however, is fierce.
Sun and Virtualization
Sun is no stranger to virtualization. Sun Solaris operating systems, for example, lead in a kind of virtualization called OS partitioning. In OS partitioning, also called application containers, multiple applications running under a single OS act as if they each have sole ownership of the underlying OS. (Another vendor example of an OS partitioning approach is Parallels Virtuozzo Containers 4.0.)