Microsoft is continuing its steady progress on Windows Server 2016, and Technical Preview 4 (TP4) introduces more significant features. The headline addition in TP4 is Hyper-V Containers. Think of these as mid-way between the Docker-style Windows Server Containers introduced in TP3 and familiar virtual machines; they're lightweight containers but they run inside a lightweight virtual machine, so they have kernel isolation rather than just namespace and process isolation. That's useful for isolating potentially malicious code if you're a hoster running code for customers that you may or may not be able to trust. It could also prove useful for ...

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