سلام
برای مثال :
Xen is an open-source para-virtualizing virtual machine monitor (VMM), or 'hypervisor', for the x86 processor architecture. Xen can securely execute multiple virtual machines on a single physical system with close-to-native performance. Xen facilitates enterprise-grade functionality, including:
* Virtual machines with performance close to native hardware.
* Live migration of running virtual machines between physical hosts.
* Up to 32 virtual CPUs per guest virtual machine, with VCPU hotplug
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