Atlantis Computing virtualization consultant Jim Moyle released a white paper (28 pages) on Virtual Desktop Infrastructure (VDI) Input/Output operations per second (IOPS) for Windows 7 deployments.
Windows 7 IOPS for VDI is a very important topic – as Moyle points out – since:
many IT organizations planning a Windows 7 migration with VDI are unaware that the combination of Windows 7 and Anti-virus more than doubles the amount of memory and IOPS required per desktop compared to Windows XP
Moyle conducted tests using various tools, such as IOMeter and WinSAT to measure maximum I/O and Login VSI to measure VM density and user experience.
--> The rest is on the blog : http://virtualization.info/en/news/2011/05/paper-windows-7-iops-for-vdi-deep-dive.html