DNS statistics from node operators

Jacob Appelbaum jacob at appelbaum.net
Tue Jun 2 22:17:38 UTC 2009


I'm looking into some simple DNS related statistics in the Tor network.
Specifically, I wrote a small patch that tells an operator the total
number of cached entries for their node. I'd like to know about your DNS
cache size, especially if you run a fast node!

Here's an example of this feature in use with my node 'badbits', a node
that averages about 20-30Mb/s.

I'm running a very alpha version where Nick merged my DNS cache counting
root at badbits:~# tor --version
Jun 02 17:15:22.293 [notice] Tor v0.2.2.0-alpha-dev. This is
experimental software. Do not rely on it for strong anonymity. (Running
on Linux i686)
Tor version

root at badbits:~# pkill -SIGUSR1 tor
root at badbits:~# grep -i dns /var/log/tor/notices.log
Jun 02 17:14:33.597 [notice] Our DNS cache has 3486 entries.
Jun 02 17:14:33.597 [notice] Our DNS cache size is approximately 1108920


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