From owner-freebsd-questions@FreeBSD.ORG Tue Jun 29 21:39:31 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B4FF616A4CE for ; Tue, 29 Jun 2004 21:39:31 +0000 (GMT) Received: from smtp.owt.com (smtp.owt.com [204.118.6.19]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6882143D39 for ; Tue, 29 Jun 2004 21:39:31 +0000 (GMT) (envelope-from kstewart@owt.com) Received: from [207.41.94.233] (owt-207-41-94-233.owt.com [207.41.94.233]) by smtp.owt.com (8.12.8/8.12.8) with ESMTP id i5TLcnco030994; Tue, 29 Jun 2004 14:38:52 -0700 From: Kent Stewart To: Jorn Argelo Date: Tue, 29 Jun 2004 14:39:16 -0700 User-Agent: KMail/1.6.2 References: <20040629140231.7b57dedf.wmoran@potentialtech.com> <200406291348.07456.kstewart@owt.com> <40E1D985.1080801@wcborstel.nl> In-Reply-To: <40E1D985.1080801@wcborstel.nl> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200406291439.16831.kstewart@owt.com> cc: freebsd-questions@freebsd.org cc: Bill Moran Subject: Re: REPOST: Performance problems with FTP X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Jun 2004 21:39:31 -0000 On Tuesday 29 June 2004 02:05 pm, Jorn Argelo wrote: > Kent Stewart wrote: > >On Tuesday 29 June 2004 11:02 am, Bill Moran wrote: > >>I'm having some really weird problems with ftp performance on > >> FreeBSD 4.10 that I just can't seem to figure out. > >> > >>My uplink here maxes out at about 35k/sec. If I scp to the machine > >>in question I get about 30k/sec (which is expected) but when I ftp, > >> I never get anything better than 15k/sec, and occasionally as low > >> as 8k/sec. > >> > >>Using a server colocated at another facility, I can ftp at about > >>45k/sec, and scp at about 60k/sec. > >> > >>Downloads are all as expected ... scp and ftp downloads seem to be > >> in about the same range, and it's a number I would expect. > >> > >>I tried running the ftp daemon that ships with FreeBSD, as well as > >>Proftpd and they both exhibit the same performance issues. > >> > >>Most settings on this machine are at their defaults. I've tried > >>tweaking send/recv sizes, as well as toggling delayed_ack. None of > >>these have made any difference so far. > >> > >>Suggestions? Is anyone else seeing this? > > > >I want to add that I have a machine that did that once in awhile. As > >soon as I see it, I look at my switch and the NIC has switched into > >half-duplex. An ifconfig still shows full-duplex. I would power down > >and reboot and it went away for awhile. > > > >After having done this 3 or 4 times, I powered it down, reseated the > > NIC and it has been a little over three weeks since it flipped > > modes on me. > > > >Kent > > But even if it is an 10 MBit NIC running half duplex, it should still > be capable of handling internet traffic at normal speeds (200 - 300 > KB/s or something, depends on your line of course) > > My first insight of those problems is probably bad DNS settings. What > about FTPing to your ip address? Is that giving you the bad speed as > well? > That only occurs when both ifconfig and the NIC are set at half-duplex. The system is on a local network and all systems are in the hosts table. The network is 100Mb/s but the ftp xfer rate would drop to 8KB/s. It is my test system and the drop from 11MB/s to 8KB/s was noticeable. Kent -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html