On 27/05/2011 13:44, Jeroen van Ingen wrote: > Hi Adam, > >> I'm talking of 1000 users on the end of a 1GE, not 50,000. I don't think >> either of these scenarios are worrying. >> >> 300MB takes<3seconds on 1GE or 30 seconds on 100M. I don't think those >> kinds of events will have an appreciable effect on the platform here. An >> album is what, 100MB? A 5min HD youtube video is going to be a similar >> size. Also too small to care about. These kinds of things don't get >> worse in high speed, they get easier. >> >> Same with patch tuesday, I think even a Win7 SP1-like release wouldn't >> cause major headaches, as streaming SD TV for an hour is more bandwidth >> than SP1 (nevermind HD). >> >> I'm more interested in the levels of traffic that we will see consistently. > Perhaps students are not average users, but our Resnet currently has: > * Approx 2000 connections, most at 100 Mbps. > * These are divided into 4 areas, each area is connected with 1 Gbps to > central location (so on average you could say we have 500 users sharing > a 1 Gbps link) > * Central location has 10 Gbps uplink; stats for this link over the last > 7 days at 10-min average polling interval are: > in: min 422 Mbps, avg 883 Mbps, max 1570 Mbps, 95th pct 1250 Mbps. > out: min 48 Mbps, avg 272 Mbps, max 571 Mbps, 95th pct 459 Mbps. > > Perhaps these numbers can be used as an indication for your > sizing/design. Most useful response so far, thanks very much :) adam.
Wow, that works out be a per-connect max of 785 kbps. Frank -----Original Message----- From: Adam Armstrong [mailto:lists@memetic.org] Sent: Friday, May 27, 2011 7:54 AM To: Jeroen van Ingen Cc: nanog@nanog.org Subject: Re: Contention/Oversubscription maths On 27/05/2011 13:44, Jeroen van Ingen wrote: <snip>
Perhaps students are not average users, but our Resnet currently has: * Approx 2000 connections, most at 100 Mbps. * These are divided into 4 areas, each area is connected with 1 Gbps to central location (so on average you could say we have 500 users sharing a 1 Gbps link) * Central location has 10 Gbps uplink; stats for this link over the last 7 days at 10-min average polling interval are: in: min 422 Mbps, avg 883 Mbps, max 1570 Mbps, 95th pct 1250 Mbps. out: min 48 Mbps, avg 272 Mbps, max 571 Mbps, 95th pct 459 Mbps.
Perhaps these numbers can be used as an indication for your sizing/design.
Most useful response so far, thanks very much :) adam.
participants (2)
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Adam Armstrong
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Frank Bulk