--- On Fri, 11/23/12, Andre Oppermann <an...@freebsd.org> wrote:
> From: Andre Oppermann <an...@freebsd.org> > Subject: Re: Low Bandwidth on intercontinental connections > To: "Ingo Flaschberger" <i...@xip.at> > Cc: freebsd-net@freebsd.org > Date: Friday, November 23, 2012, 10:05 AM > On 23.11.2012 15:46, Ingo > Flaschberger wrote: > > Am 23.11.2012 13:47, schrieb Marc Peters: > >> PR filed: http://www.freebsd.org/cgi/query-pr.cgi?pr=173859 > > > > Downloads from ftp1.us.freebsd.org to Europe (ping time > ~170ms), I see up & down ramping of transfer > > speed (600kb/sec - 50kb/sec) > > over serverall releases: > > FreeBSD 6.3-PRERELEASE > > FreeBSD 7.2-STABLE > > FreeBSD 8.2-STABLE > > FreeBSD 9.1-PRERELEASE > > > > Linux performs much better, max speed was 1.2Mb/sec, > and is not as much up & down ramping as freebsd. > > It's about 168ms for me and I don't see the problem here. > Speed is about 18.4Mbps. > > -- > Andre It's probably something with the window timeout. On a local connection, the acks come in before the window is fully sent (or very nearly) while on a distant connection the window is sent and then there is a longish delay/wait. This used to be a big issue on ftp servers back in the day. The algorithms for how to send stuff when the window left was less than a full packet were poorly done. BC _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
