[tor-bugs] #22453 [Core Tor/Tor]: Relays should regularly do a larger bandwidth self-test

[Tor Bug Tracker & Wiki]

#22453: Relays should regularly do a larger bandwidth self-test
-------------------------------------------------+-------------------------
 Reporter:  arma                                 |          Owner:  juga
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.0.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  034-triage-20180328,                 |  Actual Points:
  034-removed-20180328, tor-bwauth,              |
  035-backport, 034-backport-maybe, 033          |
  -backport-maybe, 029-backport-maybe-not        |
Parent ID:  #25925                               |         Points:
 Reviewer:  teor                                 |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 If we decide we need this test, Nick suggested this design:
 * new relays should start their bandwidth tests at the 10th percentile of
 observed bandwidths in all relay descriptors
 * relays should send traffic for 11 seconds based on their previous
 observed bandwidth

 I also think:
 * we should use some small multiple (2x?) of the previous observed
 bandwidth
 * there should be a minimum and maximum bandwidth, probably min(1st
 percentile, minimum relay bandwidth) and min(90th percentile, maximum
 believable bandwidth)

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22453#comment:35>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online