Purpose
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<span style="color: #000000"> The purpose of this study is to investigate the effectiveness of tiering</span> for [TULIP|http://www.slac.stanford.edu/comp/net/wan-mon/tulip/]. (i.e we have a set of primary landmarks tier0 which will narrow down the location to a particular region*\[1\] and then more denser secondary tier1 landmarks can be used to get more accurrate results). Currently we are looking into two regions North America and Europe. We are trying to build heuristics which will enable us to find the region of a particular host. |
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We also calculated median alpha from SLAC which is ~ 46.5km/ms and IQR ~15.6km/ms or IQR/Median~ 33% or ~ +-16%
Faran uses the maximum alpha value in order to avoid underestimation which is ~ 62.98 km/ms. Also Faran calculates alpha based on PingER historical data to all the world regions and in this study we only used the North American PingER sites.
Europe
Conclusion
62.9841 |