From owner-freebsd-stable@FreeBSD.ORG Mon Sep 29 22:00:54 2008 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1322110656A0 for ; Mon, 29 Sep 2008 22:00:54 +0000 (UTC) (envelope-from nomadlogic@gmail.com) Received: from rv-out-0506.google.com (rv-out-0506.google.com [209.85.198.237]) by mx1.freebsd.org (Postfix) with ESMTP id D44778FC14 for ; Mon, 29 Sep 2008 22:00:53 +0000 (UTC) (envelope-from nomadlogic@gmail.com) Received: by rv-out-0506.google.com with SMTP id b25so2127557rvf.43 for ; Mon, 29 Sep 2008 15:00:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=q8B+i/Lwed+OhmhaToESOhtxSpLQoSc7MKN/qi1NLaA=; b=hCuTqByrJGT5ZJ8CQSpIBmdOcJfQU8UXBYlYfuFlrNyCY8rR9xCMQESRwE9vsv9dOy fzCEpSR59zuXeA5SSHEHZKe9u+nYyJumo6EnxZxUuxOxA3NbgZJhpUR2M/uZ4i4p1Axp Lg9inRx1hP6O8q/I9Z357vNhbXvpGHgPz8oSc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=Qc+Ew0dDcSgqMZ8/f4bIcKHl64xvZTw7X5nELX/9JYOJIPcgrlN06ERvHkXmP3CqpC GRy+2cYrrnmKk6EdvH09OzL/SpAo5YhdIk3U9A6jbx/F87sxSSQ38qaHYRNsz4+rZCde sHEXCvn3nywhKaEHwbY2gTITnEFqijP34FquI= Received: by 10.114.37.1 with SMTP id k1mr6583676wak.44.1222724029498; Mon, 29 Sep 2008 14:33:49 -0700 (PDT) Received: by 10.115.95.2 with HTTP; Mon, 29 Sep 2008 14:33:49 -0700 (PDT) Message-ID: <57d710000809291433n2d8f48ebv9e54f868a7422654@mail.gmail.com> Date: Mon, 29 Sep 2008 14:33:49 -0700 From: "pete wright" To: "Holger Kipp" In-Reply-To: <20080929090310.GA70418@intserv.int1.b.intern> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080928205300.GF60230@in-addr.com> <20080928222414.GA90269@icarus.home.lan> <20080929090310.GA70418@intserv.int1.b.intern> Cc: "firmdog@gmail.com" , Jeremy Chadwick , stable@freebsd.org, net@freebsd.org Subject: Re: 7.1-PRERELEASE : bad network performance (nfe0) 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, 29 Sep 2008 22:00:54 -0000 On Mon, Sep 29, 2008 at 2:03 AM, Holger Kipp wrote: > On Sun, Sep 28, 2008 at 06:30:03PM -0400, firmdog@gmail.com wrote: >> No....you misunderstood. The 7.1 box was connected to a 5.4 box doing a 50GB >> data transfer over rsync. Both nics were 1000 full duplex with a crossover cable. >> The speed performance was terrible and I could only get up to 10 Mb/s and there >> was NO switch involved. I believe there is a problem or bug involved with the >> driver. Have the drivers or stack been updated in 7.1? What else can I provide? > > Hi, I only flipped through the messages in this thread, faintly remembering someone > writing something about ssh. Anyway, if you're copying using ssh (scp, sftp), then > the transfer rate is much less than what you'd expect - due to the encryption/decryption > overhead (unless you have hardware acceleration on both sideds). > FWIW I think the general issue for the ssh suite of tools is the compiled in window size is not tuned for large transfers like this: http://www.psc.edu/networking/projects/hpn-ssh/theory.php we use a propritary tool called aspera to overcome these issues when moving large amounts of data b/w remote sites on our WAN: http://www.asperasoft.com/products/scp/index.html the encrytp/decrypt overhead should be pretty minimal on modern hardware, so i would not expect that to be the first bottle neck you run into. -pete -- ~~o0OO0o~~ Pete Wright www.nycbug.org NYC's *BSD User Group