communicating {HEAD ~ a status} of {TAIL ~ 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 an internal node of the network 
of
communicating { HEAD ~ a status } of { TAIL ~ 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 an internal node of the network
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH