oVirt project was initiated from virtual desktop project. It supported an open desktop protocol SPICE from the beginning which gave a nice 2D performance driven by the various graphics drivers on different OSs. Do you have a target in mind? Like what is ratio of virtual desktops per physical servers? Does the virtual desktop support support video playback? Do you need to support other client protocol besides SPICE? 2013-4-10 5:34, John Baldwin: -- --- 舒明 Shu Ming Open Virtualization Engineerning; CSTL, IBM Corp. Tel: 86-10-82451626 Tieline: 9051626 E-mail: shuming(a)cn.ibm.com or shuming(a)linux.vnet.ibm.com Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC