I found a couple interesting posts that highlight why Windows 7 is a far superior operating system for customers considering VDI deployments.
Here’s a post about Task Priority Registers and how they are handled within Windows XP such that Hypervisors, ours or other vendors, are overtasked in handling them relative to Windows 7. In fact, Intel designed a feature in SOME of their processing chips called vTPR which you really have to have to use Windows XP in VDI scenarios. Without it, Windows XP performs too poorly so if you’re going to use Windows XP as a VDI OS, be really really sure you have an Intel chip w/ vTPR.
- Windows XP guests exhibiting poor performance when running under VDI
http://blogs.technet.com/b/askperf/archive/2010/07/23/windows-xp-guests-exhibiting-poor-performance-when-running-under-vdi.aspx
Here’s a post that talks about the value of RDP7 for customers that are considering deploying Windows in VDI. RDP7 is designed to redirect various visual technologies like video, audio, high end graphicsl like Aero effects, and multimonitor sessions. Windows XP does not have this technology and instead resorts to using RDP 5.2, a 9 year old protocol.
- Windows 7 with RDP7: Best OS for VDI
http://blogs.msdn.com/b/rds/archive/2009/11/02/windows-7-with-rdp7-best-os-for-vdi.aspx
