[tor-relays] Consensus weight drops continuously 28h after getting guard flag

teor teor at riseup.net
Sun Jan 13 02:32:37 UTC 2019


Hi,

> On 12 Jan 2019, at 01:44, Ilka Schulz <ilka at schulz.com.de> wrote:
> 
> Is there actually any detailed documentation on how consensus weight is calculated?

Consensus weight is calculated using a relay's self-reported peak bandwidth
usage, and measurements from ~6 bandwidth authorities around the world.

The process is slightly different on some of the bandwidth authorities, because
we are migrating to a newer system.

There is detailed documentation here:

5/6 bandwidth authorities run torflow:

https://gitweb.torproject.org/torflow.git/tree/NetworkScanners/BwAuthority/README.spec.txt#n298

1/6 bandwidth authorities run sbws:

https://github.com/juga0/sbws/blob/master/docs/source/specification.rst#simple-result-processing
https://gitweb.torproject.org/torspec.git/tree/bandwidth-file-spec.txt#n656

> Also, my bandwidth (as well as my cpu, etc.) is only used to a fraction of its capacity, even though my relay is three weeks old now. The RelayBandwidthRate option does not limit here...

Tor is a connection-oriented, reliable-transport, low-latency network, so it will
never use your full bandwidth capacity. If it did, latency would suffer.

Here are some initial steps for troubleshooting:
https://trac.torproject.org/projects/tor/wiki/doc/MyRelayIsSlow

T
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