29.6 Saving and Restoring Guest Systems
A running guest operating system can be saved and restored using the virsh utility. When saved, the current status of the guest operating system is written to disk and removed from system memory. A saved system may subsequently be restored at any time (including after a host system reboot).
To save a guest:
# virsh save guestName path_to_save_file
To restore a saved guest operating system session:
# virsh restore path_to_save_file