[tor-project] May 2017 report for the metrics team

[Karsten Loesing]

Hello Tor, hello world!

Below you'll find the highlights of Tor metrics team work done in May 2017.

On behalf of the Tor metrics team,
Karsten


Added new visualizations of OnionPerf onion server measurements to the
Metrics website [1].

 [1]
https://metrics.torproject.org/torperf.html?start=2017-03-03&end=2017-06-01&source=all&server=onion&filesize=50kb

Experienced a sustained increase in requests to the Onionoo [2] servers
from 800/sec ~4k/sec for almost 1 week, which could finally be handled
by increasing the number of front-end servers from 2 to 5 and reducing
the TLS RSA key size from 4k to 2k.

 [2] https://metrics.torproject.org/onionoo.html

Released metrics-lib version 1.7.0 [3] which adds support for newly
added fields in Torperf/OnionPerf files and extra-info descriptors,
streamlines some method names, and fixes a few bugs.

 [3] https://lists.torproject.org/pipermail/tor-dev/2017-May/012261.html

Performed an analysis of adding Laplace noise to directory-request
statistics to evaluate whether the resulting statistics would still be
sufficient for estimating user numbers, but concluded that this still
needs more research.

 [4]
https://trac.torproject.org/projects/tor/wiki/org/teams/MetricsTeam/ObfuscationSimulationAnalysis

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