vSphere has a feature "Enter Maintenance Mode" where a host can be marked for maintenance, which causes all vm's running on that host to queue up and migrate to other hosts in the cluster in an orderly fashion (i.e. not all at once) so it can be safely rebooted for updates and config changes. This is quite a bit easier than manually sitting there and shepherding a lot of virtual machines one by one, so I thought I would ask if Proxmox 3.1 has an equivalent feature?