On Tue, Dec 4, 2012 at 4:05 PM, Tal Mizrahi <ta...@marvell.com> wrote:
> Hi, > > We are looking for publicly available statistics of network latency > measurements taken in large networks. > For example, there is FCC's measurements ( > http://www.fcc.gov/measuring-broadband-america/2012/july > > ). > However, we are looking for something more detailed that can show a large > number of latency measurements taken periodically (preferably with as small > a period as possible). > > Here are the datasets I'm aware of: ICSI Netalyzr The FCC measurements MLabs http://www.measurementlab.net/ None of them, to my knowledge, take latency measurements "periodically". I watched a nice demo at a talk about Mlabs a couple weeks ago of the ability to query their data set and plot the results. They happened to plot a million or so latency samples (and they have when those samples were taken). Just don't throw out the "can't possibly happen" outliers; bufferbloat is bad enough (if you look at the Netalyzr scatterplots you can find here http://gettys.wordpress.com/2010/12/06/whose-house-is-of-glasse-must-not-throw-stones-at-another/ you'll see why...). Unfortunately, latencies measured in *seconds* are not only possible, but not uncommon (e.g. my brother's DSL service has > 3 seconds of buffering in each direction under load). - Jim
