Plan virtual architectures (SharePoint Server 2010)

<div class="text_exposed_root text_exposed">This article discusses key considerations for planning virtual architectures by using Microsoft SharePoint Server 2010 server roles. This article does not include performance or capacity planning data or recommendations. It describes general guidance for planning virtual environments and includes example architectures for small, medium, and large size farms.
In this article:
Virtual versus physical architectures
virtual architectures for small to medium size farms</div><div class="text_exposed_root text_exposed">virtual architectures for medium to large size farms

http://technet.microsoft.com/</div>
en-us/library/ff607811.aspx