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From a very high level view:

  • Open Stack is sort of framework to manage your cloud but you need to implement things
  • Cloud Stack / Cloud Shift / Rancher are more or less solutions to get your cloud running but less customizable

Then, where does Nutanix go? Is it unique through extended storage support?

J. Doe
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Nutanix is proprietary Software-Defined Storage stack (NDFS, Nutanix Distrubuted File System) which is nothing but NFS/SMB3 gateway built on top of Java-written Cassandra DB, + open-source derived Prism UI for management, + performance and backup-specific (CBT-bases snapshots for integration with Veeam backup etc). In a nutshell: nothing unique :)

BaronSamedi1958
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    thanks :-) phew, quite astonishing to learn more about technology behind a unicorn. Regarding proprietary, it has also a community edition, right? – J. Doe Oct 04 '18 at 07:24
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    Yup. Community edition is stripped down in terms of performance, but functionality is more or less the same. In general see: http://www.cultofanarchy.org/perfomance-test-nutanix-4-node-cluste/ – BaronSamedi1958 Oct 04 '18 at 13:53