From owner-freebsd-chat Fri Jan 21 9: 7:49 2000 Delivered-To: freebsd-chat@freebsd.org Received: from yana.lemis.com (yana.lemis.com [192.109.197.140]) by hub.freebsd.org (Postfix) with ESMTP id 2EC7815433 for ; Fri, 21 Jan 2000 09:07:44 -0800 (PST) (envelope-from grog@mojave.worldwide.lemis.com) Received: from mojave.worldwide.lemis.com (m14.chn.vsnl.net.in [202.54.43.197] (may be forged)) by yana.lemis.com (8.8.8/8.8.8) with ESMTP id DAA09847; Sat, 22 Jan 2000 03:37:31 +1030 (CST) (envelope-from grog@mojave.worldwide.lemis.com) Received: (from grog@localhost) by mojave.worldwide.lemis.com (8.9.3/8.9.3) id WAA01382; Fri, 21 Jan 2000 22:37:19 +0530 (IST) (envelope-from grog) Date: Fri, 21 Jan 2000 22:37:19 +0530 From: Greg Lehey To: Dag-Erling Smorgrav Cc: FreeBSD Chat Subject: Re: New speed record? Message-ID: <20000121223719.I918@mojave.worldwide.lemis.com> Reply-To: Greg Lehey References: <20000121172731.B517@mojave.worldwide.lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: ; from des@flood.ping.uio.no on Fri, Jan 21, 2000 at 04:12:01PM +0100 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Friday, 21 January 2000 at 16:12:01 +0100, Dag-Erling Smorgrav wrote: > Greg Lehey writes: >> All this has me wondering why. It seems that ftp gets particularly >> bad performance when transferring full frames (1460 bytes payload). >> While this transfer is (not) progressing, I can access the system at >> the other end interactively. It seems that if I could persuade ftpd >> to send smaller frames, I might get better throughput. Does anybody >> have opinions? > > Maybe some routers are configured to give small packets priority over > large ones? I'd guess that this isn't an issue of fragmentation. It *may* be an issue of TOS, but this appears not to be implemented. > Lower the MTU on your interface, see if it helps. No, the PPP interface reassembles the packets. What I'm getting through is 1460 byte packets, which seem to be the default I get from ftpd; the MTU of my PPP interface would only be an issue if that link were the bottleneck. Even a 300 bps link would be adequate in this case :-( Greg -- Finger grog@lemis.com for PGP public key See complete headers for address and phone numbers To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message