Date: Wed, 7 May 1997 10:56:57 -0700 (PDT) From: Tom Samplonius <tom@sdf.com> To: Shawn Carey <smc@servtech.com> Cc: freebsd-hackers@freebsd.org Subject: Re: FTP Performance Message-ID: <Pine.NEB.3.94.970507105544.27170B-100000@misery.sdf.com> In-Reply-To: <3370BCEB.1CFBAE39@servtech.com>
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On Wed, 7 May 1997, Shawn Carey wrote: > Hello, > > I have what seems to be a strange problem with FTP performance varying > drastically between getting files from and putting files to my FreeBSD > 2.2.1 FTP server. > > The machine is connected to my ISP with iijppp via a 28.8 modem. When I > FTP to a remote server, receiving files come in reasonably at 3.5-4.0 > K/sec. The same is true if someone FTP's to my system and puts a file. > > But when someone connects to my system and tries to get a file or if I > FTP to a remote server and try to put a file, the performance is dismal > (bytes/sec) and typically the transfer never even completes. > > In short, trying to get files out of my system, either by putting as a > client or by being get'ed as a server doesn't work well at all. > > To make matters even stranger (or maybe not), all of these problems > disappear if I only FTP to/from systems inside my ISP's routers. I have > contacted them about this, and they claim that the problem lies with the > systems I am trying to transfer files to/from. I could believe this if > the throughput were roughly the same no matter which direction the bits > were travelling. > > So I guess what I'm hoping to learn here is: > > a) Is there anything I can adjust to speed up outgoing FTP transfers? > b) Is there any way I can prove or disprove my ISP's claim. I could > probably prod them into action with hard evidence, but I don't know how > to get it... > > Any suggestions are appreciated. > > Thanks, > -Shawn Carey > > Try fiddling with the tcp_extensions option in /etc/sysconfig It could be that your ISP's border router can't handle them. Tom
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