Best answer

Virtualization technology

People also ask

  • What is the difference between a PV domain and a Xen?

  • Xen is an hypervisor that runs on metal (the pc / server) and then hosts virtual machines called domains. A Xen PV domain is a paravirtualized domain, that means the operating system (usually we’re talking linux here) has been modified to run under Xen, and there’s no need to actually emulate hardware.

  • What is a Xen HVM domain?

  • A Xen HVM domain is hardware emulated domain, that means the operating system (could be Linux, Windows, whatever) has not been modified in any way and hardware gets emulated.

  • What is the difference between Xen and KVM?

  • Xen (both PV and HVM) can do live migration of a running guest from one physical server to another, I don’t know if KVM can too. Both Xen and KVM cannot overcommit memory so you usually get true RAM, while other platforms like VMware can swap part of the guest ram to disk.

  • What is a guest type in Xen?

  • Xen guests are often called as domUs (unprivileged domains). Both guest types (PV, HVM) can be used at the same time on a single Xen system. Xen Paravirtualization (PV) Paravirtualization is an efficient and lightweight virtualization technique introduced by Xen, later adopted also by other virtualization solutions.