communicating a status of the data migration by the data migration node to one or more other data migration nodes responsible for managing data migration, wherein {HEAD ~ the data migration node} is {TAIL ~ an internal node} of the network 
is
communicating a status of the data migration by the data migration node to one or more other data migration nodes responsible for managing data migration , wherein { HEAD ~ the data migration node } is { TAIL ~ an internal node } of the network
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH