Description:
A Multi-hypervisor Virtual Machine (VM) in which a single VM can simultaneously run on multiple hypervisors.
Background:
Standard nested virtualization allows a hypervisor to run other hypervisors as guests, i.e. a level-0 (L0) hypervisor can run multiple level-1 (L1) hypervisors, each of which can run multiple level-2 (L2) virtual machines (VMs), with each L2 VM is restricted to run on only one L1 hypervisor.
Technology Overview:
Span provides a Multi-hypervisor VM in which a single VM can simultaneously run on multiple hypervisors, which permits a VM to benefit from different services provided by multiple hypervisors that co-exist on a single physical machine. Span allows (a) the memory footprint of the VM to be shared across two hypervisors, and (b) the responsibility for CPU and I/O scheduling to be distributed among the two hypervisors. Span VMs can achieve performance comparable to traditional (single-hypervisor) nested VMs for common benchmarks
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Advantages:
- Users can run their own hypervisors in IaaS clouds.
- Live migration of hypervisors + guest VMs as a single entity.
- Hypervisor-level intrusion detection/prevention.
Intellectual Property Summary:
U.S. 9,798,567
Patent rights available for licensing.