If the times are the same, then {HEAD ~ the local file system} is used to read {TAIL ~ the file} 
is used to read
If the times are the same , then { HEAD ~ the local file system } is used to read { TAIL ~ the file }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL