In one embodiment, {HEAD ~ an optimal sequence} of {TAIL ~ data movements} depends on the storage system objectives 
of
In one embodiment , { HEAD ~ an optimal sequence } of { TAIL ~ data movements } depends on the storage system objectives
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH