Re: [gaia] Heterogeneity in network capacity: growing?

"Eric A. BREWER" <brewer@berkeley.edu> Mon, 29 February 2016 15:00 UTC

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Date: Mon, 29 Feb 2016 07:00:22 -0800
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From: "Eric A. BREWER" <brewer@berkeley.edu>
To: Manner Jukka <jukka.manner@aalto.fi>
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Cc: "gaia@irtf.org" <gaia@irtf.org>, Michael Welzl <michawe@ifi.uio.no>
Subject: Re: [gaia] Heterogeneity in network capacity: growing?
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Seems to me the two likely bottlenecks are last-mile mobile links
(especially old devices), and international gateways.  Since international
bandwidth can be quite expensive (even with undersea fiber in some areas,
but especially without it), there is often throttling and/or congestion at
those points, even when your device has high bandwidth.


On Mon, Feb 29, 2016 at 1:11 AM, Manner Jukka <jukka.manner@aalto.fi> wrote:

> Hi,
>
> I don’t have a published analysis to cite, have done similar comparisons
> many times in various presentations. I could run that distribution from the
> Netradar database for 2014 and 2015, just need to give me the X buckets
> where to allocate the samples.
>
> Market analysis is a bit trickier, since measurements need to be mapped to
> a region somehow. IP address is one option if it can be trusted enough.
>
> Jukka
>
> > On 29 Feb 2016, at 10:16, Michael Welzl <michawe@ifi.uio.no> wrote:
> >
> > First,
> >
> > Apologies for asking first formulating a question in two ways with
> contradictory outcomes (yes/no) and then saying "I guess the answer is no"
> - that was confusing!  :)   I was tired when I wrote it...
> > so I meant the second question, i.e. my guess was also that
> heterogeneity *is* growing.
> >
> > How would you calculate if there was data: I guess what I'm interested
> in is bandwidth statistics: how often do we see a bottleneck of X bit/s?
> The Internet-wide distribution of X is what I'm looking for...
> >
> > Depending on area/market: I'd also be happy to have X for India, X for
> Europe, X for ... whatever. It's a start!
> > Ideally citable - some publicly available study I could refer to.
> >
> > Cheers,
> > Michael
> >
> >
> >
> >> On 29 Feb 2016, at 08:33, Manner Jukka <jukka.manner@aalto.fi> wrote:
> >>
> >> Hi,
> >>
> >> I would say yes, they are globally, but it also depends on what
> area/market you are talking about. How would you calculate it if there was
> data? I have data, but not sure how to calculate this.
> >>
> >> cheers,
> >> Jukka
> >>
> >>> On 29 Feb 2016, at 01:04, Michael Welzl <michawe@ifi.uio.no> wrote:
> >>>
> >>> Hi,
> >>>
> >>> I guess this is probably the right group to ask: is the heterogeneity
> of link bandwidths growing?
> >>> Another way of asking this is: across the whole Internet, do old links
> roughly get removed as quickly as capacities grow?
> >>>
> >>> I guess the answer is no - but are there any good citable references
> for this? Data?
> >>>
> >>> Cheers,
> >>> Michael
> >>>
> >>> _______________________________________________
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> >
>
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