95th percentile Burstable billing

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aggregate 95th percentile request length 24 hours


the 95th percentile used mathematical calculation evaluate regular , sustained use of network connection. 95th percentile method more closely reflects needed capacity of link in question tracking other methods such mean or maximum rate. bytes make packets not cost money, link , infrastructure on either end of link cost money set , support. method of billing commonly used in peering arrangements between corporate networks, not used isps because internet service providers need committed information rates (cirs) planning purposes.


since networks oversubscribed, there room bursting without advanced planning (hence burstable billing). ignoring top 5% of samples reasonable compromise in cases (hence 95th percentile).


many sites have majority of traffic on mondays, monday traffic determines rate whole month. providers offer billing on 90th percentile incentive attract customers irregular bandwidth patterns.


the 95th percentile allows customer have short (less 36 hours, given monthly billing period) burst in traffic without overage charges. 95th percentile says 95% of time, usage @ or below amount. conversely, 5% of samples may bursting above rate.


the sampling interval, or how samples (or data points) taken, important factor in percentile calculation. percentile calculated on set of data points. every data point represents average bandwidth used during sampling interval (e.g., 5 minutes) , calculated number of bits transferred throughout interval divided duration of interval (e.g., 300 seconds). resulting value represents average use rate single sampling interval , expressed bits per second (see data transfer rate).








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