From owner-freebsd-stable@FreeBSD.ORG Mon Jan 16 06:58:58 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0F82E106564A for ; Mon, 16 Jan 2012 06:58:58 +0000 (UTC) (envelope-from bzeeb-lists@lists.zabbadoz.net) Received: from mx1.sbone.de (mx1.sbone.de [IPv6:2a01:4f8:130:3ffc::401:25]) by mx1.freebsd.org (Postfix) with ESMTP id 9C3CA8FC0A for ; Mon, 16 Jan 2012 06:58:57 +0000 (UTC) Received: from mail.sbone.de (mail.sbone.de [IPv6:fde9:577b:c1a9:31::2013:587]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mx1.sbone.de (Postfix) with ESMTPS id 4DB1125D37C7; Mon, 16 Jan 2012 06:58:56 +0000 (UTC) Received: from content-filter.sbone.de (content-filter.sbone.de [IPv6:fde9:577b:c1a9:31::2013:2742]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPS id 8CFAABD947E; Mon, 16 Jan 2012 06:58:55 +0000 (UTC) X-Virus-Scanned: amavisd-new at sbone.de Received: from mail.sbone.de ([IPv6:fde9:577b:c1a9:31::2013:587]) by content-filter.sbone.de (content-filter.sbone.de [fde9:577b:c1a9:31::2013:2742]) (amavisd-new, port 10024) with ESMTP id s8rFozn0frOk; Mon, 16 Jan 2012 06:58:54 +0000 (UTC) Received: from orange-en1.sbone.de (orange-en1.sbone.de [IPv6:fde9:577b:c1a9:31:cabc:c8ff:fecf:e8e3]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by mail.sbone.de (Postfix) with ESMTPSA id C903FBD947D; Mon, 16 Jan 2012 06:58:53 +0000 (UTC) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: "Bjoern A. Zeeb" In-Reply-To: Date: Mon, 16 Jan 2012 06:58:52 +0000 Content-Transfer-Encoding: 7bit Message-Id: References: <9728B37F7A4EBE45A2FD4B18883BAED6D02612@SN2PRD0802MB111.namprd08.prod.outlook.com> <40A76FC1992140AFA5B8EB52C28DB3A1@multiplay.co.uk> <1196DEC9-2AEE-4F9A-8521-EFA8513D6003@lists.zabbadoz.net> To: Kevin Oberman X-Mailer: Apple Mail (2.1084) Cc: Steven Hartland , ml-freebsd-stable Stable Subject: Re: HPN-SSH question X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Jan 2012 06:58:58 -0000 On 16. Jan 2012, at 04:56 , Kevin Oberman wrote: > On Sun, Jan 15, 2012 at 10:58 AM, Bjoern A. Zeeb < > bzeeb-lists@lists.zabbadoz.net> wrote: > >> On 15. Jan 2012, at 16:28 , Steven Hartland wrote: >> >>> Yep we installed openssh-portable + HPN and experienced noticeably >>> reduced transfer rates on high latency links, exactly the opposite >>> as one would expect. I don't have the exact figures I'm afraid as >>> we just went straight back to standard ssh. >>> >>> I'll try and get some time to retest and provide some proper >>> results. >> >> Thanks. If you do please try the bundled version in 8-STABLE or 9 and >> also gather the usual meta data (latency, packet loss, IPv4/v6, any >> socket buffer tuning, ...). >> > > And, if it happens with 9, any chance of a tcpdump capture of all of the > headers for analysis? (No packet data needed.) We use the HPN version > extensively on high latency links (often trans-oceanic) and have never seen > that. I'd find running tcptrace and generating time plots very useful for > looking at this sort of performance issue. Or using siftr. /bz -- Bjoern A. Zeeb You have to have visions! It does not matter how good you are. It matters what good you do!