[tor-bugs] #18967 [Metrics/Onionoo]: Add UUID to families in Onionoo

Tor Bug Tracker & Wiki blackhole at torproject.org
Fri May 20 03:07:33 UTC 2016


#18967: Add UUID to families in Onionoo
-----------------------------+---------------------
 Reporter:  seansaito        |          Owner:
     Type:  enhancement      |         Status:  new
 Priority:  Medium           |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  persistence,     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:                   |        Sponsor:
-----------------------------+---------------------

Comment (by virgil):

 > Would you two want to suggest a UUID algorithm based only on server
 descriptors published in the past `k` hours?

 I looked into candidate designs for this.  In short, the `k` hours model
 entails there will be no persistence beyond `k` hours.  And even for
 values like `k=48`, I presume want UUIDs to last longer than 2 days.  It
 just becomes a 48-hour delay before "use the largest fingerprint".

 We could in fact do this, but whenever a the highest fingerprint of a
 family changes, it's going to have its points reset.

 I thought about this a bit more.  But if we aren't going back to an
 established beginning, everytime a new Onionoo server joins, it will have
 a different perception of what the families are.  I see no way around this
 without a central-server or blockchain-like infrastructure.

 It may be that we simply have to go with the highest fingerprint.  This is
 unfortunate.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18967#comment:6>
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