Microsoft has just released two documents which talked about the IaaS architecture.
a) Virtualization part – Click here to download “IaaS Product Line Architecture Fabric Architecture Guide” . This document provides guidance for developing fabric (compute,network, storage and virtualization layer) in three architecture pattern: Non-Converged, Converged Network and Continuous Availability over SMB Storage
b) Management part – Click here to download “IaaS Product Line Architecture Management Architecture Guide” . This document provides guidance to develop Microsoft Private Cloud infrastructure using Windows Server 2012 and System Center 2012 SP1