Date: Sat, 18 Feb 2006 10:20:27 -0800 (PST) From: Danial Thom <danial_thom@yahoo.com> To: ptitoliv <ptitoliv@frenchsuballiance.cjb.net>, freebsd-questions@freebsd.org Subject: Re: Bandwidth Problems with Freebsd 5.x Message-ID: <20060218182027.8061.qmail@web33305.mail.mud.yahoo.com> In-Reply-To: <43F73267.6010807@frenchsuballiance.cjb.net>
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--- ptitoliv <ptitoliv@frenchsuballiance.cjb.net> wrote: > Hello everybody, > > I am writing here because I have a problem with > network on freebsd 5.3 > and 5.4. The machines are pluged in a 100 > Mbit/s with via rhine network > cards. On this same LAN I have a Debian Sarge > computer. When I try to > transferts big files beetween the FreeBSD and > the Debian, I see that I > have an assymetric bandwith : > > >From Debian to BSD : No problem. The bandwitdh > is OK : About 8 MBytes/s > which is normal for a LAN I guess. > >From BSD to Debian : The bandwidth is quite > awful => Beetween 300 > KBytes/s to 1Mbyte/s. > > Network have been changed and the problem is > still the same. So I > thought it was a network problem. Then I > installed an other FreeBSD on a > different computer and plugged it in a > completely different network and > the problem is still here. That's why I think > there is a thing to > configure on the BSD system but I don't know > why. > > That's why I am looking here for someone who > knows this problem and who > will be able to help me. > > Thank you for your answers > > Best Regards, > ptitoliv Are you doing "GET" from each machine, or comparing GET to PUT? Get has always been a lot faster then PUT. Put a monitor on the LAN and look for weird sending patterns. The 4.x FTP servers will stop altogether if you set the window under 1500 bytes. I don't know if its the server app or the stack, but its probably the specific application, as HTTPD seems not to have such problems. I think ftp was originally written by a chimp and no-one has really bothered to ever fix it (much like nfs). Its quite possible that socket changes in 5.x made a kludgy implementation not work as well as it used to. DT __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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