Citrix has announced the availability of the “Creedence” tech preview of the next version of XenServer, building on the open-source Xen Project’s Creedence alpha.4 release. The biggest change in Creedence is the move to an all 64-bit implementation. While the Xen hypervisor has always been 64-bit and can run both 32 and 64-bit guest operating systems, …