Nutanix offers enterprise ready hypervisor. Its integrated with Nutanix enterprise cloud OS stack. Below diagram shows how a single AHV node looks
The AHV is built upon the CentOS KVM foundation and it include features like HA, live migration.
KVM architecture consists of following components
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KVM-kmod
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Libvirtd:An API, daemon and management tool for managing KVM and QEMU.
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Qemu-kvm: A machine emulator and virtualizer that runs in userspace for every Virtual Machine (domain)
For details about AHV architecture please refer following article