[88896] in North American Network Operators' Group
Re: How do you (not how do I) calculate 95th percentile?
daemon@ATHENA.MIT.EDU (Alex Rubenstein)
Wed Feb 22 15:24:36 2006
Date: Wed, 22 Feb 2006 15:24:09 -0500 (Eastern Standard Time)
From: Alex Rubenstein <alex@nac.net>
To: Warren Kumari <warren@kumari.net>
Cc: Jo Rhett <jrhett@svcolo.com>, nanog@merit.edu
In-Reply-To: <A772293E-62C2-41AF-9DC3-6C1865EBC6D2@kumari.net>
Errors-To: owner-nanog@merit.edu
(I did this fast, and, who knows; I could be off my an order or two of
magnitude)
> Most people are using 64 bit counters. This avoids the wrapping problem
> (assuming you don't have 100GE and poll more then once every 5 years :-)).
2^64 is 18,446,744,073,709,551,616 bytes.
100 GE (100,000,000,000 bits/sec) is 12,500,000,000 bytes/sec.
It would take 1,475,739,525 seconds, or 46.79 years for a counter wrap.
--
Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben
Net Access Corporation, 800-NET-ME-36, http://www.nac.net
