Proxy server 105 may aggregate and store {HEAD ~ performance data} provided by {TAIL ~ control units} 150 and 165, respectively 
provided by
Proxy server 105 may aggregate and store { HEAD ~ performance data } provided by { TAIL ~ control units } 150 and 165 , respectively
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH