[tor-relays] Tor relay from home - end of experiment?

[teor]

> 
> On 14 Dec. 2016, at 19:47, Rana <ranaventures at gmail.com> wrote:
> 
> Why, while GG2's speed as MEASURED by tor and reported in atlas is 153.6 kbytes/sec, its actual bandwidth utilization is about 0.3 kbytes/sec (=0.2% of its capability) is still beyond me, and resolving this by further increasing bandwidth does not seem plausible to me.

The observed bandwidth is the *maximum* (highest, largest, most)
bandwidth your relay has sustained over the most utilised (biggest,
busiest) 10 second period in the last 24? hours.

https://en.wikipedia.org/wiki/Sample_maximum_and_minimum

The bandwidth utilisation you quote is the *average* (mean, overall,
evened out) bandwidth your relay has used over the last 24? hours.

https://en.wikipedia.org/wiki/Arithmetic_mean

If you don't understand the difference between a maximum and an average,
perhaps it would help to read the links above.

Again, I'll leave that with you.

> On 14 Dec. 2016, at 20:36, Andreas Krey <a.krey at gmx.de> wrote:
> 
>> A. The fact that the Authorities are located in West Europe and North America does not mean that the USERS are there.
> 
> That does not matter - they themselves are well connected, and measure
> bandwidth, not ping times. It might just be that home dsl providers
> have bad peering, as rumoured for german telekom and some north american
> providers. Putting bandwidth auths behind some net curtain would optimize
> the bandwidth measurements for that specific curtain, which would not
> help people behind other curtains with different holes/peerings. The
> question is what volume a relay can carry, and not how well it is
> connected to a particular place in the world.

The bwauth calculations do take latency into account, and they should:
if CPU usage or bandwidth are near their limit, the latency through the
relay will be high. (Or connections will fail:
https://gitweb.torproject.org/torflow.git/tree/NetworkScanners/BwAuthority/data/tor.1/torrc#n16
)

This has the drawback that relays located away from the US/Western
Europe get poor scores. There's no way to compensate for this without
it being gamed, except for distributing the bandwidth authorities
closer to either relays or users.

But this has a drawback: the Tor network is fast because the consensus
weight centroid is located in an area which has a lot of low-latency
connections. If we shift that centroid, then the network will slow
down.

This is a problem that needs more research :-)

T

-- 
Tim Wilson-Brown (teor)

teor2345 at gmail dot com
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