Changes
= Abstract =
The Qemu Guest Agent permits access to a VM via a virtual serial socket. This has the advantage that the VM can be accessed via the VM node (hypervisor) without network connection or remote desktop protocol.
This is a requirement to be able to take disk-only-snapshots without downtime by issueing a disk-freeze (shadow-copy) within the guest prior to taking the snapshot.
Furthermore it is useful for orchestrating CPU and memory hotplugging:
* guest OS must be told to enable CPU/memory after hot-plug
* guest OS must release a CPU/memory prior to hot-unplug
= Libvirt =
