[libvirt-users] Using resource pools (in vmware vcenter) with libvirt

Hi I am evaluating use of libvirt to manage a cluster of ESXi servers. We plan to use "resource pool" concept of vcenter/vmware to easily scale-up or scale-down the cluster of ESXi servers "Resource pools are partitions of computing and memory resources from a single host or a cluster" Since VM can be designated to hosts, clusters or "resource pool".. assigning VM to resource pool allows a simple way to manage scale-up / scale-down operations. This is because one doesn't need to know identity of ESXi server (from cluster of servers) to assign/place a VM.. one can just refer to resource pool. identity of ESXi servers in all the (vcenter) API calls. Is my understanding correct? If so, does libvirt have a similar concept/notion so that VM life-cycle can be managed without knowing identity of underlying server? with regards Ashutosh