Hello, reading this documentation page: http://docs.openstack.org/mitaka/networking-guide/migration-neutron-database.html I dont get what means having two parallel migration branches. Do you have to choose one of the branches ? If yes how ? Or it just means that some operations can be safely run when Neutron Server API is running, (e.g. neutron-db-manage upgrade --expand) while other operations (e.g. neutron-db-manage upgrade --contract) require the Neutron Server to be stopped ?? Anyone has some upgrade notes to share that can clarify the procedure ? Thank you Saverio