Hi, I forgot to tell you more sure, however the crystal ball worked very well.
It's a 12M ADSL that works at approximately 1300 ko/s at max speed. When downloading with a browser a client such as filezilla it works at full speed but when I type ftp and use OBSD's one it is rather 350/380 max never more. Actually if anything would limit the bandwith the other client would be so. That's stange, I changed sysctl inet.tcp recv/send to 65536 but it's still same transfer speed. I use it on ftps that are rather fast so it looks like ftp is somewhere limited in my configuration. Regards, JF 2009/6/20 Marcos Laufer <mar...@ipv4networks.com> > This is a very interesting subject. > Is there any official paper describing how to tune TCP on OpenBSD? > Googling i found this two interesting links, but none specifically mentions > OpenBSD: > > Enabling high performance data transfers > http://www.psc.edu/networking/projects/tcptune/ > > TCP tuning cookbook > http://proj.sunet.se/E2E/tcptune.html > > This other paper is about OpenBSD, but i do not know how accurate is it: > > Network and speed performance guide (OpenBSD) > https://calomel.org/network_performance.html > > Opinions? > > Marcos > > > > Markus Hennecke escribis: > > Jesus Sanchez schrieb: >> >>> Jean-Frangois SIMON escribis: >>> >>>> Hi all, >>>> >>>> It looks like the max bandwidth of ftp is somehow 350 Kb/s. >>>> Is this normaland if so can it be increased ? >>>> >>> >>> ?? it must be your bandwidth limit, there's nothing >>> about a 350 kb/s limit anywhere. please, read carefulle >>> the ftp manpage. >>> >> >> As there are some information missing, I look into my crystal ball and see >> that Jean-Frangois is downloading with help of the ftp program via DSL which >> is either 6Mbit or faster. >> >> Due to the latency of the DSL line the standard settings for >> net.inet.tcp.recvspace (see sysctl) are not correct for this kind of setup. >> He should try to increase it, for me 65536 works on 6Mbit DSL. >> >> Please tell me in case this is all wrong so that I can order a new crystal >> ball! >> >> Enough guessing, HTH >> Markus
