[tor-bugs] #4142 [Tor Relay]: Make relays and bridges publish a new descriptor after writing stats

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#4142: Make relays and bridges publish a new descriptor after writing stats
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 Reporter:  karsten      |          Owner:     
     Type:  enhancement  |         Status:  new
 Priority:  normal       |      Milestone:     
Component:  Tor Relay    |        Version:     
 Keywords:               |         Parent:     
   Points:               |   Actualpoints:     
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Comment(by karsten):

 Sebastian and I briefly discussed how long statistics publication is
 delayed in practice due to relays only publishing descriptors every 18
 hours.  I ran a quick analysis that compares the `dirreq-stats-end`
 timestamp to the `published` timestamp of the first descriptors containing
 the stats.  See the attached graph (and [https://gitweb.torproject.org
 /metrics-tasks.git/tree/HEAD:/task-4142 code]).  The result is that the
 delay is about 8 hours on average.

 The graph does not show how many statistics we're missing because relays
 went offline.  In theory, we could count relays with 24+ hours uptime that
 don't publish a new descriptor before disappearing from the consensus.
 Those could in theory have published a descriptor with stats if we changed
 the timing.  I didn't run this analysis now, but I guess the number would
 be non-zero.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4142#comment:7>
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