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Re: [tcpm] Initial CWND

"Scheffenegger, Richard" <rs@netapp.com> Tue, 17 March 2015 21:17 UTC

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From: "Scheffenegger, Richard" <rs@netapp.com>
To: Matthew Luckie <mjl@caida.org>, Michael Welzl <michawe@ifi.uio.no>
Thread-Topic: [tcpm] Initial CWND
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Date: Tue, 17 Mar 2015 21:12:40 +0000
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References: <81564C0D7D4D2A4B9A86C8C7404A13DA320C6182@ESESSMB205.ericsson.se> <C460E937-02F4-4EDF-8DB7-18F6DD1C73DD@ifi.uio.no> <20150317141127.GA9488@spandex.luckie.org.nz>
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Cc: "tiangewu@caida.org" <tiangewu@caida.org>, "tcpm@ietf.org" <tcpm@ietf.org>
Subject: Re: [tcpm] Initial CWND
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Just a note of warning - the alexa top n (with n < something like 10 000) sites may not be representative of the overall population.

For starters, the topmost sites will all utilize CDNs, load balancers, reverse proxys etc, which you'll not find further down in the alexa top 1M list.


Picking a similar sample from some distributed sites further down the list, and comparing these two samples might be revealing to certain aspects (at the least, it would be statistically be more valid). We (Brian Trammel et. al.) found this in our recent ECN testing exercise).

Best regards,
  Richard


> -----Original Message-----
> From: tcpm [mailto:tcpm-bounces@ietf.org] On Behalf Of Matthew Luckie
> Sent: Dienstag, 17. März 2015 15:11
> To: Michael Welzl
> Cc: tiangewu@caida.org; tcpm@ietf.org
> Subject: Re: [tcpm] Initial CWND
> 
> > I hope this helps... and I hope others have some more recent data.
> 
> I have a student (Tiange Wu, cc'd) who has been working with various tbit
> tests who has recent data for ICW.
> 
> http://www.caida.org/~mjl/icw-1460.png
> 
> That graph covers 6714 servers in the first alexa 10K on Feb 10 2015.
> A 1460 MSS was advertised.

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