I would like to know what virtualization technology is being used for VMs running in Windows Azure. I am specifically looking for what type of hypervisor is being used. Such as Microsoft Hyper V, Xenserver, Vmware ect.
Virtualization Layer is pretty much Hyper-V, but the management layer (Fabric Controller) is highly customized. This allows to migrate VM seamlessly between Cloud (Azure) and on-premise, Hyper-V based hosting, in both directions.