This talk was held by Gojko Adzic (@gojkoadzic) as a replacement for Markus Gärtner (@mgaertne), who unfortunately has been sick.
I found it was a quite challenging topic, therefor I didn’t take much notes, and my article might be quite fraqmentary. If you feel so, please scroll down to the very end, there I will link to some stuff on Gojko’s homepage, which gives more & additional insight on the topic.