Unikernels
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Xen Project has been at the forefront of the birth of Cloud Operating Systems: specialized lightweight operating systems which are only intended to be used within a Virtual Machine. These Cloud Operating Systems may become the core of a new form of cloud, where a single hypervisor instance can support hundreds or even thousands of VMs.
Cloud Operating System List
The following Cloud Operating Systems are currently of interest to the Xen Project:
- MirageOS, an official incubator effort of Xen Project, employs an OCaml-based kernel
- LING (formerly Erlang on Xen) creates an Erlang runtime environment. See the Presentation.
- HaLVM, the Haskell Lightweight Virtual Machine from Galois, allows you to run Haskell programs
- OSv from Cloudius Systems produces a Java environment. See the Presentation.