[141005] in North American Network Operators' Group
Re: Contention/Oversubscription maths
daemon@ATHENA.MIT.EDU (Adam Armstrong)
Fri May 27 10:52:09 2011
Date: Fri, 27 May 2011 15:52:08 +0100
From: Adam Armstrong <lists@memetic.org>
To: Shaun Bryant <sbryant@thepit.org>
In-Reply-To: <BANLkTimS7XF-y+5o3V4ZuwoKNOdOVV5z_Q@mail.gmail.com>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 27/05/2011 15:49, Shaun Bryant wrote:
> I run a WISP, where we have moved customers from 3mb/s to 8mb/s to
> 20mb/s over the course of 5 years. We do this one tower at a time
> (about 150 customers) what we have learned is usage grows overtime not
> with the increase in available bandwidth. Our Per-Customer-Avg (PCA)
> stayed about the same with each bump in bandwidth, the avg user does
> not use more bandwidth because they have more bandwidth or at least
> not our 1200 customers.
>
> That said we have had our PCA move up more then 30% in the last 7
> months due mainly to Netflix, the nice thing is this usage is "off
> peak" for our business customers and as such has not been a concern.
>
Yeah, I fully expect this.
In previous networks I've generally seen a doubling of traffic every 12
months. Generally the traffic is static during spring/summer, and then
doubles over 6 months in autumn/winter.
Though, I'm not sure how this will manifest itself with such high access
speeds.
adam.
