It looks like filezilla uses several transfert at the same time to reach 1Mo/s however each transfert is ~400Ko/s as for OpenBSD's FTP client.
Maybe the bandwith limit per file transfered is limited from the server side ? Is there any way to make multiple transferts at the same time with mget since that would accelerate some transfers in some cases. Regards, JF 2009/6/20 Jean-Frangois SIMON <[email protected]> > 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 <[email protected]> > > 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
