On Fri, Aug 26, 2016 at 01:42:38AM +0000, Liu, Zhuotao wrote:
This is Sky from University of Illinois. Currently we are working on research project related with Tor.
To help us to better design and evaluation our proposal, we need some information about the Tor relays that is currently unavailable from the Atlas. Thus, if someone who operates Tor relays could provide us such information, your help will be greatly appreciated. :)
We hope to have an estimate about computation capacity of Tor relays. For instance, how many circuits a relay can maintain when its CPU is driven to about 100%? On average, how many circuits are maintained by a busy guard and what the CPU utilization is. These kinds of information would be really helpful.
I don't know about CPU usage, but as for circuits, I think you can get them from @extra-info and @bridge-extra-info descriptors: https://collector.torproject.org/#type-extra-info https://collector.torproject.org/#type-bridge-extra-info For example, see some of the files at https://collector.torproject.org/recent/relay-descriptors/extra-infos/
The "cell-circuits-per-decile" lines might be interesting to you. https://spec.torproject.org/dir-spec: "cell-circuits-per-decile" num NL Mean number of circuits that are included in any of the deciles, rounded up to the next integer.
For parsing the descriptor files, you can use Stem: https://stem.torproject.org/_modules/stem/descriptor/extrainfo_descriptor.ht...