Wed, Apr 20, 2016 at 07:27:53AM -0700, Leo Bicknell wrote:
90%+ of the stacks deployed will be too small. Modern Unix generally has "autotuning" TCP stacks, but I don't think Windows or OS X has those features yet
OS X since ~10.5 has autotuning, here are some hints from ESnet https://fasterdata.es.net/host-tuning/osx/ Personally never tried this on the sat-type RTT. As explained, scaling factor of 3 is a limiting one for high-performance transfers. For sat links may limit the things too, since 64K * 2^3 / 0.9 ms RTT * 8 ~ 4.5 Mbit/sec, but one's mileage may vary. And, of course, packet loss can turn down this BDP-derived speed drastically. -- Eygene Ryabinkin, National Research Centre "Kurchatov Institute" Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.