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Re: [tor-bugs] #27135 [Core Tor/sbws]: Write descriptor bandwidths average in raw results
#27135: Write descriptor bandwidths average in raw results
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Reporter: juga | Owner: juga
Type: defect | Status: assigned
Priority: Medium | Milestone: sbws 1.0 (MVP must)
Component: Core Tor/sbws | Version:
Severity: Normal | Resolution:
Keywords: | Actual Points:
Parent ID: #27108 | Points:
Reviewer: | Sponsor:
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Comment (by juga):
> 1. Set the decay constant (R) to a number in (0, 1).
>
> We get a descriptor every 12-18 hours, and there is a daily cycle in
Tor bandwidths.
If i just get the descriptor every 12h, after 5 days will have 10 values
for it, and if it changes, then i think would be enough to get the mean of
them.
> So we want to average over a few days, to smooth out spikes. A good
value for R is 0.98 every hour, because the decaying average for 15 hour
bandwidths is 26% B1 + 19% B2 + 14% B3 + 11% B4 + 30% B5-10. (B11 is less
than 1%.)
Where these numbers (0.98, 26, 19,...) are coming from?. Mathematics might
help
> 4. When voting:
By when voting you mean when we generate the bandwidth list file?
> > btw, it seems that the answer to my question in [1] is that 1/45 ~=
1/e
>
> Can you explain what you mean by `e`?
>
> The base of the natural logarithm is `e ~= 2.72`, so `1/e ~= 0.37`.
i meant the natural logarithm, exactly that ^
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27135#comment:12>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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