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[tor-bugs] #32129 [Circumvention/Snowflake]: Increase Snowflake proxy poll interval to 300 s
#32129: Increase Snowflake proxy poll interval to 300 s
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Reporter: dcf | Owner: (none)
Type: enhancement | Status: new
Priority: Medium | Milestone:
Component: Circumvention/Snowflake | Version:
Severity: Normal | Keywords:
Actual Points: | Parent ID:
Points: | Reviewer:
Sponsor: |
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The Snowflake proxies are polling the broker more frequently than
necessary for the number of clients we have. The broker reports about 500
proxies currently, which at the current poll interval of 20 s, is 25
polls/s.
At the [http://meetbot.debian.net/tor-meeting/2019/tor-
meeting.2019-10-17-16.59.log.html anti-censorship meeting today] we talked
about increasing the interval to 300 s, which would still give us an
expected time-to-proxy-assignment of less than 1 s.
{{{
17:41:02 <dcf1> A few weeks ago I tailed the log of the broker, and
requests were coming in furiously.
17:41:23 <dcf1> Lately those particular log lines have been removed, so
it's not as apparent, but according to https://snowflake-
broker.bamsoftware.com/debug there's 500 proxies,
17:41:39 <dcf1> and with a poll interval of 20 s, that's 25 incoming proxy
requests per second.
17:41:42 <arma2> i liked the idea of having the broker tell each snowflake
when to come back
17:41:59 <dcf1> Something on the order of 1 or 2 per second is probably
adequate.
17:42:07 <cohosh> arma2: serna has started on that ticket
17:42:14 <cohosh> i agree
17:42:23 <dcf1> arma2: yeah that's #25598, serna ran into some trouble
with that.
17:42:42 <cohosh> we have metrics of how many idle proxies we have:
https://metrics.torproject.org/collector/archive/snowflakes/
17:42:57 <cohosh> and it is orders of magnitude more than the the number
of client matches
17:43:31 <dcf1> Anyway, I think an interval of around 300 seconds would be
workable.
17:43:37 <cohosh> sounds good
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32129>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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