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Chapter 10: Measurement for P2P Overlays - Pg. 229

CHAPTER Measurement for P2P Overlays 10 The P2P overlay depends on the service characteristics of the underlying net- work, but in today's Internet the state of links and routers is not easily available to applications. Thus many overlay networks use periodic probing of the underly- ing network to measure network conditions. Since such measurements on the scale of a P2P overlay can significantly load the network, techniques for reducing the probing are of interest. P2P overlays frequently need to exploit network latency for decisions regarding locality, proximity, and topology. This chapter dis- cusses the use of Internet coordinate systems and other techniques for estimating