The biggest areas of improvement in the new build are around virtualization and containers. The preview allows exposing more of the underlying hardware capabilities to virtual machines, with support for virtualized non-volatile memory and virtualized power/battery status. For both containers and virtual machines, networking capabilities have been enhanced to enable a wider range of virtual network capabilities with greater performance.
The focus on containerization has also seen the Nano Server deployment of Windows Server change. Presently, Nano Server is still a full operating system, but with the Redstone 3 release of Windows later this year, that’s going to change. It’s going to be a strictly container-only deployment. Upgrading and maintaining Nano Server will be done through updating the container image. This has enabled Microsoft to strip down the Nano Server installation. It no longer requires, for example, the Windows servicing stack. Because it’s upgraded simply by replacing the image, Nano Server no longer needs to use Windows Update itself. The result is a 70 percent reduction in the image’s footprint.