An anonymous reader quotes a report from The Stack: Mesosphere, creator of the world's first data center operating system, has confirmed significant strategic investment from Microsoft and Hewlett Packard Enterprise. Mesosphere, built on the open-source Apache Mesos project, closed $73.5 million in a Series C funding round. With HPE and Microsoft leading the round, the startups total funding to date tallies at almost $126 million. The operating system is currently used at mega-scale by customers including Verizon, Netflix and Twitter. It also underpins Microsoft's Azure Container solutions.