SIGUSR2

Since havana, nova has the ability to use the rbd backend for ephemeral storage. The relevant configuration lines in nova.conf are: libvirt_images_type = rbd libvirt_Images_rbd_pool = "" libvirt_images_rbd_ceph_conf = ""...

The openvswitch agent can be configured with a different MTU for the VIFs on the compute nodes. Also, nova can be configured with a different MTU on the VIF:VETH pairs....