By partitioning data into segments and by defining {HEAD ~ checkpoints} based upon {TAIL ~ the segmentation}, a process may be restarted at each defined checkpoint 
By partitioning data into segments and by defining { HEAD ~ checkpoints } based upon { TAIL ~ the segmentation } , a process may be restarted at each defined checkpoint
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH