SLAC logo PingER pair grouping distributions
Les Cottrell, Warren Matthews and Connie Logg, Last Update: January 15, 1999
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In order to effectively handle a large number of monitor-host remote-host pairs it is necessary to aggregate the data into groups representing areas of interest. The most obvious grouping is by global area (e.g. U.S., Europe, Canada, Australasia). U.S can be further broken down into the major domains (.edu, .com, .org, .gov,. net, .mil), and other global areas can be subdivided (e.g. Asia divides into japan, China, Russia and the rest of Asia). The chart below shows the distribution of PingER pairs categorized by the remote-host site's global area.
Global area distribution

Another way to aggregate the pairs is to use affinity groups, such as all ESnet sites, vBNS sites, XIWT sites, Surveyor sites etc. The chart below show such as distrinution. Not that in this case a pair may show up in multiple affinity groups.

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Les Cottrell