[tor-relays] More Tor measurements next week [opt out]

[Zachary Newman]

tl;dr: Low-load measurements coming; no action needed unless you 
would like to opt out.

Hi all,
 
Next week (week of 2021-05-31), we will be starting a wide-scale 
measurement of the latencies between relays on the Tor network for 
a research project; these measurements will last an estimated 1-2 
months.   We have the permission of the Tor Research Safety Board 
and this information will ultimately be used to improve the 
network. Further, the load at any one time on the Tor network from 
these measurements will be limited and negligible (approximately 
the same load as the start-up tests of a few new Tor clients). 
We are coordinating with the currently-running speed test[1], and 
will start our measurements after the conclusion of this speed 
test.   If you operate a relay and would like to opt out of these 
measurements, please send us an email (shortor at csail.mit.edu) 
including the fingerprint of your relay(s). We will stop sending 
you traffic and, if the test has begun, delete past measurements 
involving your relay(s).   Status updates will be posted 
publicly[2], and we will bump this thread before we start and if 
anything important changes.   Please contact shortor at csail.mit.edu 
with any questions.

Regards,
Zack Newman (on behalf of the ShorTor team)

[1] https://lists.torproject.org/pipermail/tor-relays/2021-May/019649.html
[2] https://people.csail.mit.edu/zjn/tor.txt