[metrics-team] Hello from blackbird

Su Yu graylatern at gmail.com
Fri Mar 1 21:27:40 UTC 2019

Sorry! I realized I should've added some caption to the figures.

- In the two histograms are the distribution of the age of Tor versions.
Most people have their Tor between 0 - 250 days old and there is a
long-tail distribution.
- In the box plot, the boxes contain the first quantile to the third
quantile of data points, and the line in the center is the median. The
upper and lower "whiskers" show the maximum and minimum of the data, and
the points above the top whisker are outliers. It appears that there are
less bridges with very old versions, but the bridges and relays are similar
in keeping up with new versions.

You're definitely right that the temporal changes are important. I'll focus
on this in some follow-up analysis. I have a couple of questions regarding

1. What is the "date" column in the csv file you shared, specifically?
2. What's a good way to see the the unattended updates data? I can look
into it if you could point me to a general direction.
3. It seems many of the potential questions will require new data. I'm
happy to work on data generation/cleaning; but is there a good way to share
the datasets or figures? They may also be too large for the mail list..

Hi Teor - thank you for chiming in! The release schedule page looks
awesome. I notice there is not any mention of dev versions - is that
information also available somewhere?



On Thu, Feb 28, 2019 at 6:43 PM teor <teor at riseup.net> wrote:

> Hi,
> On 28 Feb 2019, at 19:00, Karsten Loesing <karsten at torproject.org> wrote:
> On 2019-02-22 23:05, Su Yu wrote:
> I did some quick plotting in Jupyter notebook (see below; the figures
> are also attached separately). Regarding the relays vs. bridges question
> that you mentioned, it seems the bridges are better at keeping
> themselves not /too/ outdated, but they're actually not that different
> in keeping up-to-date?
> Thanks for making these graphs. Though it's hard (for me) to interpret
> these results.
> One reason might be that these graphs are considering a time frame of
> over 1 decade. A lot of things have changed over that time frame:
> - The network has grown a lot over the years, which means that recent
> years have a greater weight in those graphs than distant years. This
> doesn't have to be a bad thing, it's just probably not intended and
> possibly surprising when interpreting the results.
> - Release cycles have changed, with a much shorter cycle in the last
> year or two as compared to earlier years. This may skew results even more.
> If I were to continue this analysis I'd try to look more at changes over
> time. Things I'd look at:
> - How does the shorter release cycle affect update behavior? It's
> probably useful to look at Tor's change log to get an idea when versions
> have been updated, when versions have been sunset, and which versions
> have long-term support.
> We have a summary page for past releases and our release schedule:
> https://trac.torproject.org/projects/tor/wiki/org/teams/NetworkTeam/CoreTorReleases#Calendar:
> T
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