On Fri, Dec 02, 2016 at 05:22:23PM -0500, Neal Cardwell wrote: > Of course, if we find important use cases that don't work with BBR, we will > see what we can do to make BBR work well with them.
I have one thing that I _wonder_ if could be BBR's fault: I run backup over SSH. (That would be tar + gzip + ssh.) The first full backup after I rolled out BBR on the server (the one sending the data) suddenly was very slow (~50 Mbit/sec); there was plenty of free I/O, and neither tar nor gzip (well, pigz) used a full core. My only remaining explanation would be that somehow, BBR didn't deal well with the irregular stream of data coming from tar. (A wget between the same machines at the same time gave 6-700 Mbit/sec.) I will not really blame BBR here, since I didn't take a tcpdump or have time to otherwise debug properly (short of eliminating the other things I already mentioned); most likely, it's something else. But if you've ever heard of others with similar issues, consider this a second report. :-) /* Steinar */ -- Homepage: https://www.sesse.net/ _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat