Network Latency Measurements

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1

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).

Any help will be appreciated.

Thanks,
Tal Mizrahi.

2

Hi Tal,

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).

Have you asked RIPE Atlas for data?
I think this is pretty much what you might find useful.

Greetings

Dan

3

Hi Tal,

4

Would the bufferbloat people be a good place to ask?
http://www.bufferbloat.net/

5

It is in beta and in spanish, though:

http://simon.labs.lacnic.net/simon/api
http://simon.labs.lacnic.net/simon
http://simon.labs.lacnic.net/simon/participate/

  If you found it useful we could create an english version.

Regards
as

6

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

7

As part of the iPlane project, we have been gathering traceroutes daily for the last 6.5 years from a couple of hundred PlanetLab sites to over 100K prefixes.

Data for the last six months is available at http://iplane.cs.washington.edu/data/iplane_logs/2012/ and all older data is at http://iplane.cs.ucr.edu/iplane_logs/

http://iplane.cs.washington.edu/data/data.html has a description of the dataset.

Cheers,
Harsha