I'm using flavor extra-specs to limit the bandwidth of the instance. Reference in https://wiki.openstack.org/wiki/Insta... :

$ sudo nova flavor-key m1.small set quota:vif_inbound_average=10240

$ sudo nova flavor-key m1.small set quota:vif_outbound_average=10240

I have achieved the desired results, but I do not understand its mechanism of action. When i hard-reboot the virtual machine, specs-extra value is used like? Can someone help me?