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