Can a virtual machine under Xen run another virtual machine ?

I wonder if a virtual machine ran by Xen could run VMware, VirtualBox, etc ? What about the performance ?
Claws HoEngineerAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Are you referring to Nested Hypervisors ?

There will be a performance hit, it's okay for Labs, but not good for production.

Try it, and you will see the performance degradation.
Claws HoEngineerAuthor Commented:
Hi Andrew,

Which Hypervisors have you tried and worked ? Could you suggest, please ? Thank you!
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Are you referring to Nesting Hypervisors under Xen ?
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Claws HoEngineerAuthor Commented:
Yes!
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
We experimented with VMware Workstation and VMware vSphere, performance was poor, or shocking.

Worse than Nesting under ESXi.
NerdsOfTechTechnology ScientistCommented:
Hypervisors can be nested: Yes.

Including Xen: Yes.

Each virtual machine is technically "independent" of one another

Your only limitation here is your hardware. Depending on the requirements of your development, you may require more memory, or an upgrade to a 64-bit "base-host" operating system.

Most OS's support nesting too.

Hint: You will see improved performance if you enable x86 virtualization support on your computer (if your motherboard and CPU support it), and AFAIK, you can "pass through" this feature to multiple nested virtual machines.

"n" virtual machines nested in eachother, is supported so long as the 1st to the n-1th nested guest OS has support for x86 virtualization (the base host must also support it).

Some additional security vulnerabilities are present in nested hyper-Vs so take the appropriate precautions (virtual COM ports, etc.).

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