North American Network Operators Group

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Re: 95th Percentile again (was RE: C&W Peering Problem?)

  • From: Alex Rubenstein
  • Date: Sun Jun 03 00:35:11 2001

> This may be obvious, but billing by volume (bytes transferred) places far
> greater availability requirements on the measurement system than rate-based
> charging schemes.

Not particularly.

If you have the average (not median) of usage for the month, even losing a
sample here or there, you'd be just as accurate as a 95th %tile which may
have missed the same measurements.

> If I am charging by the byte, I have to count every packet. If my measurement
> system breaks, I lose money until it is fixed.

See above, 'average'.