From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt1-x834.google.com (mail-qt1-x834.google.com [IPv6:2607:f8b0:4864:20::834]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id C9FD83CB40; Sat, 15 Dec 2018 12:21:53 -0500 (EST) Received: by mail-qt1-x834.google.com with SMTP id r14so9826376qtp.1; Sat, 15 Dec 2018 09:21:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=j3ePhcZU/bZwn2b7eXvW2qYLhGthnZ3opNsDVLMSSQw=; b=sjwbhQdd7ZrPvjzIFfHh/bMa1VLIxC4tFzerCyy8wH5eRZ1DX19c6mOmOqr2W/7da+ SgAP6msIntVT+Ns/LOSnpVKhvhy8BqZUJUN7SLgx9YWPC/PtbdtWbcJV8hHDJRGdb84D IHeVXddXNU0sPoVeLuuHY6bwI4fb2iSq73hhzlj6WCFGmXgpnbyYFXvjOxtLe14+TsmS ox+xjutxl3njyqthyVN/wnXfg2NqyiBKiZGfKXVxJg236mMmdzKYPEo8v22g0ogkSIhP sxlPS5Sec6lCD35IfuB969fVO39n2cxVam/OWT0GsmbIh5fyykzabywHc0iXjd0B4T0s gFZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=j3ePhcZU/bZwn2b7eXvW2qYLhGthnZ3opNsDVLMSSQw=; b=qCwZW+SgjnrNBjphFjhhaiOrTyruHZLRpt6xBFoRnPlv4YtqIa+eG/LKj/JWA9+TrN RJzNb8OqDJ2+PTYGZhIlD6bK4+bNl413dnf0vvPdx36SNKyZCNnSgH/q1geCMXd0YRs9 KLdeCEk+PuFslKY5NJV4oeQcYbjpMFwm4QQVg+9e20a/Qy1hvIWwIaJqVYQ0ShMJpAGp x8kWsMK2Qam43n9dYq0Xumo8xY94klGmJ95y9R+Fp7oOn+rjO3z1r94GooE/WPMsHP9F Bg19Ie23jInqAvbpJRlsid3NrFEKjQ9MDUKXWql8wX+YBQioRdIv2GUgwFAQfbS8in+Y s7eQ== X-Gm-Message-State: AA+aEWYx/GxTBdDf38sfOe8EtMI03ipAnbJHPacBvm3U9ftZgX/grPh/ JRJorNQibMKdEnELhGC4VQtC04tkC1fWdQbRZd0= X-Google-Smtp-Source: AFSGD/UJp+v5hBqiHW26x5lvaDgjV5BXmg5nl8v47wb1TFPQFCSXY/ivz6ZR3sVGGDTZLMZVGSU6X2FHgESFjih2WDY= X-Received: by 2002:ac8:2e6a:: with SMTP id s39mr7632104qta.355.1544894513265; Sat, 15 Dec 2018 09:21:53 -0800 (PST) MIME-Version: 1.0 References: <87sgyyg1in.fsf@taht.net> In-Reply-To: <87sgyyg1in.fsf@taht.net> From: Dave Taht Date: Sat, 15 Dec 2018 09:21:41 -0800 Message-ID: To: =?UTF-8?Q?Dave_T=C3=A4ht?= Cc: Luca MUSCARIELLO , Cake List , aqm@ietf.org, bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Cake] [Bloat] paper: per flow fairness in a data center network X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 15 Dec 2018 17:21:53 -0000 Found the PDF. Much more readable. https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-serie= s-switches/white-paper-c11-738488.pdf As much lust as I have in my heart for this switch, it costs as much as a car! Sigh. On Sat, Dec 15, 2018 at 9:09 AM Dave Taht wrote: > > Luca Muscariello writes: > > > I disagree on the claims that DC switches do not implement anything. > > They do, from quite some time now. > > > > https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-s= eries-switches/white-paper-c11-738488.html > > I'm really impressed. I'd have probably heard about it if they'd > mentioned bufferbloat once :/. > > The graphs comparing their performance to arista's are far, far, far too > small to read. You can certainly see a huge improvement on mice in this > paper. > > is there a better copy of this paper around? > > What's the cheapest form of this switch I can buy? (or beg, borrow, or > steal?) I do need a 10GigE-40GigE capable switch in the lab, and BOY oh > boy oh boy would I love to test this one. > > Has this tech made it into their routing products? > > > > > On Thu, Dec 6, 2018 at 4:19 AM Dave Taht wrote: > > > > While I strongly agree with their premise: > > > > "Multi-tenant DCNs cannot rely on specialized protocols and > > mechanisms > > that assume single ownership and end-system compliance. It is > > necessary rather to implement general, well-understood mechanisms > > provided as a network service that require as few assumptions > > about DC > > workload as possible." > > > > ... And there's a solid set of links to current work, and a very > > interesting comparison to pfabric, their DCTCP emulation is too > > flawed > > to be convincing, and we really should get around to making the > > ns2 > > fq_codel emulation fully match reality. This is also a scenario > > where > > I'd like to see cake tried, to demonstrate the effectiveness (or > > not!) > > of 8 way set associative queuing, cobalt, per host/per flow fq, > > etc, > > vs some of the workloads they outline. > > > > https://perso.telecom-paristech.fr/drossi/paper/rossi18hpsr.pdf > > > > -- > > > > Dave T=C3=A4ht > > CTO, TekLibre, LLC > > http://www.teklibre.com > > Tel: 1-831-205-9740 > > _______________________________________________ > > Cake mailing list > > Cake@lists.bufferbloat.net > > https://lists.bufferbloat.net/listinfo/cake > > > > > > > > _______________________________________________ > > Bloat mailing list > > Bloat@lists.bufferbloat.net > > https://lists.bufferbloat.net/listinfo/bloat --=20 Dave T=C3=A4ht CTO, TekLibre, LLC http://www.teklibre.com Tel: 1-831-205-9740