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| Hypervisor | Gist of It | Who Uses it? | |
|---|---|---|---|
| KVM | |||
| Microsoft Hyper-V | |||
| VMWare VSphere | |||
| Xen | Install a base OS like Ubuntu. Then install Xen which then overrides and makes itslef the main OS and your original Ubuntu install a virtual machine called dom0 which you use to manage your other virtual machines. | Rackspace Cloud is powered by Xen with OpenStack. | |
| XenServer | ... |
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