http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/06/26/New-ESRI-white-paper-discusses-ArcGIS-Server-and-virtualization.aspxVirtualization, which allows multiple operating systems and applications to share the resources of a physical machine, is probably a word that you have heard. Many IT departments are adopting virtualization as part of a broader strategy to conserve resourcesenCommunityServer 2.1 SP2 (Debug Build: 61120.2)http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/06/26/New-ESRI-white-paper-discusses-ArcGIS-Server-and-virtualization.aspx#6662Mon, 29 Jun 2009 13:48:48 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:6662VBAHoleWow. This is probably the least possible content that can be considered a white paper. Packed into these 8 pages is about 5 sentences of actual information from ESRI concerning how their software will function under virtualization. And the verdict - it will be slower. Thanks for the information-packed paper. And p.s. - if i wanted to learn about what virtualization was i would have gone to wikipedia.http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/06/26/New-ESRI-white-paper-discusses-ArcGIS-Server-and-virtualization.aspx#6764Fri, 03 Jul 2009 06:11:11 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:6764LakshmananI echo same points raised above. Please never call this as white paper, rather document informs that virtualization is possible for ArcGIS Server. No case-studies, test result or scenario to build the same. Please provide indepth details.http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/06/26/New-ESRI-white-paper-discusses-ArcGIS-Server-and-virtualization.aspx#7360Tue, 04 Aug 2009 21:01:27 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:7360performance_mattersWe've inquired with our regional ESRI reps and they indicate that ESRI won't "certify" (e.g. provide tech support when things dont work as advertised) ArcGIS Server and SDE production installations inside a virtual environment. What is the story on that?http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2009/06/26/New-ESRI-white-paper-discusses-ArcGIS-Server-and-virtualization.aspx#7531Thu, 13 Aug 2009 10:33:13 GMTb60b3f0a-e2bd-4be5-8a18-822c697649ab:7531Aitor CaleroWP Conclusion section: "With virtualization becoming a standard IT practice and ArcGIS Server supporting all components of a virtualized environment on supported platforms, more organizations are considering it for their own ArcGIS Server deployments" So, imho, it is fully supported as long as the OS was also supported.