On Sep 28, 2013, at 9:01, Mikael Abrahamsson wrote: > So in datacenter one wants to start marking ECN on packets very soon into buffer depth, hoping sender will get feedback and throttle back the speed way before one gets taildrops? Yep. There have been a bunch of papers on datacenter TCP variants recently (look through the last 2-3 years of SIGCOMM papers, all online.) Lars