Service Predictability Vector Plots

In order to provide a rough indication of Internet service predictability, we use a metric developed by the NLANR program, but using our ping measurements. In this we plot the monthly average/peak ratio of packet loss versus throughput as a vector from last month to this month. The results are shown below for 1996 for ESnet nodes, International Nodes, and other North Anerica nodes. In these scatter plots, points towards the top right indicate high predictability. It can be seen that service predictability as seen from SLAC is much higher for ESnet than other nodes.

ESnet: jan96 feb96 mar96 apr96 may96 jun96 jul96 aug96 sep96
International: jan96 feb96 mar96 apr96 may96 jun96 jul96 aug96 sep96
ISP_Local: jan96 feb96 mar96 apr96 may96 jun96 jul96 aug96 sep96
North_America_East: jan96 feb96 mar96 apr96 may96 jun96 jul96 aug96 sep96
North_America_West: jan96 feb96 mar96 apr96 may96 jun96 jul96 aug96 sep96


Owner: Les Cottrell and Connie Logg