communicating {TAIL ~ 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 the data migration node is {HEAD ~ an internal node} of the network 
communicating { TAIL ~ 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 the data migration node is { HEAD ~ an internal node } of the network
OTH TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH