Hello Jeremy, On 08/10/14 00:57, Jeremy Gillula wrote: > I have a couple questions which I could probably find the answer to on > my own by writing up some scripts and doing a little research, but I > figured I'd ask here first in case anyone already knows the answer and > can take 30 seconds to reply: > > 1. Does anyone have an idea of what the usual churn rate is for Tor > nodes? (I'm guessing fairly low for most nodes, but if anyone has even > rough numbers, that would help...)
As one random starting point for your research, take a look at Figure 4.5 on page 83 (page 106 in the PDF, 2.9M): http://freehaven.net/anonbib/cache/loesing2009thesis.pdf > 2. How common is it for a node to change its exit policy and go from > being a relay-only node to an exit node (and vice versa)? If a node did > change, how quickly would that be reflected in Onionoo? (I'm guessing > the answers are rare and at most an hour after the change, respectively.) My *guess* is that this doesn't happen very often, but I don't have any numbers. And yes, Onionoo should know it after at most two hours. > I realize these are vague questions, so even > order-of-magnitude-rough-guess answers would be appreciated! If you want to do some more analysis, fetch the latest consensus tarball(s) and write a script that compares contained fingerprints ("r" lines) for the churn question and exit policy summaries ("p" lines) for the exit-policy-change question: https://collector.torproject.org/archive/relay-descriptors/consensuses/ Example: [...] valid-after 2014-10-08 01:00:00 [...] r gabelmoo 8gREE9rC4C49a89HNaGbyh3pcoE VFtJRYsyCcBUlLVV6wow2hh/Y5g 2014-10-07 10:01:26 131.188.40.189 443 80 s Authority HSDir Running Stable V2Dir Valid v Tor 0.2.5.8-rc w Bandwidth=20 Unmeasured=1 p reject 1-65535 [...] Parsing libraries are available here: https://collector.torproject.org/#libraries If you have some interesting results, please feel free to share them here! All the best, Karsten -- tor-talk mailing list - tor-talk@lists.torproject.org To unsubscribe or change other settings go to https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk
