[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [tor-bugs] #3338 [Analysis]: Why do our user graphs have these huge spikes?
#3338: Why do our user graphs have these huge spikes?
----------------------+-----------------------------------------------------
Reporter: arma | Owner:
Type: task | Status: new
Priority: normal | Milestone:
Component: Analysis | Version:
Keywords: | Parent:
Points: | Actualpoints:
----------------------+-----------------------------------------------------
Comment(by karsten):
It looks like the directory bytes estimate isn't that bad. The problem is
just that we don't have enough directory mirrors reporting directory-
request statistics to us. See the attached graph dir-bytes-estimate.pdf
for the details.
The blue line shows the extrapolated directory byte metric for all
directory mirrors. This line should be pretty reliable except for the
first few days in August 2010 when only a few directory mirrors reported
directory bytes. But we cannot use this line, because it only reaches
back to August 2010 and we want user statistics since August 2009.
The red line is our directory byte estimate based on the difference
between written and read total bytes. I would have expected a bigger
distance from the blue line or a much higher volatility. But great, in
theory, the estimate still works fine.
Now, the green line is the same estimate, but only for directory mirrors
reporting directory request statistics. We use the quotient of the red
and green line to compute our "fraction" in the other graph. I marked the
same four points with purple dots when our user number skyrocketed.
My conclusion would be that there need to be more and faster directory
mirrors reporting directory request statistics than on those four days.
If we reach around 1/3 or 1/2, bandwidth-wise, of directory mirrors
reporting directory request statistics, we should do okay.
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3338#comment:14>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
_______________________________________________
tor-bugs mailing list
tor-bugs@xxxxxxxxxxxxxxxxxxxx
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs