[tor-bugs] #30227 [Core Tor/sbws]: Work out why recent_measurements_excluded_few_count=733
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Mon Apr 22 05:26:22 UTC 2019
#30227: Work out why recent_measurements_excluded_few_count=733
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Reporter: teor | Owner: (none)
Type: defect | Status: new
Priority: Medium | Milestone: sbws: unspecified
Component: Core Tor/sbws | Version: sbws: unspecified
Severity: Normal | Resolution:
Keywords: | Actual Points:
Parent ID: #29710 | Points:
Reviewer: | Sponsor:
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Comment (by teor):
Replying to [comment:3 juga]:
> Replying to [comment:2 juga]:
> > These tickets looks good to improve scanner performance, but maybe we
could reduce complexity by implementing what proposed in
https://trac.torproject.org/projects/tor/ticket/29291#comment:4 that could
be useful for onionperf too.
>
> i just don't know how much would change the bandwidth values to create a
request and wait it stabilizes, or to make different requests with "keep-
alive" connection.
Changing the measurement method is a high-risk change. I don't think we
have time to test it properly.
Replying to [comment:2 juga]:
> #29720 could also reduce the number of measurements required.
Including bandwidths from helper relays is a high-risk change, because
helper relays have higher bandwidths than the measured relays they are
paired with. I don't think we have time to test it properly.
> #29719 may or may not improve performance, but it'd reduce complexity on
understanding why some relays get more measurements than others and the
monitoring KeyValues associated to the priority loops and the time it
takes to measure all the network.
I think #29719 is a good idea. It has some risk, but we can manage that
risk by testing for a week or two before merging.
But I think we should do #30231, #30232, and #30233 first. They are
simple, low-risk changes. And the tests will be much faster after we
improve sbws measurement speed.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30227#comment:4>
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