http://uwcryspionvholmkfxoqt2xns5mvnct34ytacugxtqpqrnka2oqm6kqd.onion/software/exptor/faq.html
PlanetLab is a distributed testbed consisting of thousands of hosts operated primarily by academic institutions around the world. PlanetLab users can
run their code on these hosts and conduct relatively large-scale experiments. Several research groups have used PlanetLab for Tor research
by either running code on a set of PlanetLab hosts that participate in the live Tor network, or by deploying a private Tor network entirely
on PlanetLab.