from sfa.planetlab.topology import Topology
from sfa.planetlab.plxrn import PlXrn, hrn_to_pl_slicename, xrn_to_hostname, xrn_to_ext_slicename, hrn_to_ext_loginbase, top_auth
from sfa.storage.model import SliverAllocation
-from sfa.storage.alchemy import dbsession
MAXINT = 2L**31-1