IETF Logo Mail Archive

Re: [aqm] paper: per flow fairness in a data center network

"dario.rossi" <dario.rossi@telecom-paristech.fr> Thu, 13 December 2018 07:59 UTC

Return-Path: <dario.rossi@telecom-paristech.fr>
X-Original-To: aqm@ietfa.amsl.com
Delivered-To: aqm@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9B2BF12875B for <aqm@ietfa.amsl.com>; Wed, 12 Dec 2018 23:59:01 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=telecom-paristech.fr
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RWmORRo3h5W0 for <aqm@ietfa.amsl.com>; Wed, 12 Dec 2018 23:58:58 -0800 (PST)
Received: from zproxy110.enst.fr (zproxy110.enst.fr [IPv6:2001:660:330f:2::c0]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3E027126CB6 for <aqm@ietf.org>; Wed, 12 Dec 2018 23:58:58 -0800 (PST)
Received: from localhost (localhost [IPv6:::1]) by zproxy110.enst.fr (Postfix) with ESMTP id BCE6582122; Thu, 13 Dec 2018 08:58:56 +0100 (CET)
Received: from zproxy110.enst.fr ([IPv6:::1]) by localhost (zproxy110.enst.fr [IPv6:::1]) (amavisd-new, port 10032) with ESMTP id j_NBCgnYaLbZ; Thu, 13 Dec 2018 08:58:55 +0100 (CET)
Received: from localhost (localhost [IPv6:::1]) by zproxy110.enst.fr (Postfix) with ESMTP id 5134E82008; Thu, 13 Dec 2018 08:58:55 +0100 (CET)
DKIM-Filter: OpenDKIM Filter v2.10.3 zproxy110.enst.fr 5134E82008
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telecom-paristech.fr; s=A6AEC2EE-1106-11E5-B10E-D103FDDA8F2E; t=1544687935; bh=CUCgNzWwc2DmP2loz0nRor/8RTI98TW/2B5d9smWJtg=; h=Date:From:To:MIME-Version:Message-Id; b=2EVZwuoM23Br+Xx0Zhj9kazovJ9W9paZ1SeKypXbeU6aVuVKiq8MzMKQAXvd72TmJ M9Y5oZzi6ab3be7ypY1DBeBB0JRkhg+UmPeTSeErJS2WpwG9g7BZby1r4G9KvkUCbq nGjdhLsdBXKzPrqFjKyMvvclXRYQGWOR0y15Ye/k=
X-Virus-Scanned: amavisd-new at zproxy110.enst.fr
Received: from zproxy110.enst.fr ([IPv6:::1]) by localhost (zproxy110.enst.fr [IPv6:::1]) (amavisd-new, port 10026) with ESMTP id h3xMQkQ_ZdTq; Thu, 13 Dec 2018 08:58:55 +0100 (CET)
Received: from [10.66.62.188] (unknown [37.170.59.60]) by zproxy110.enst.fr (Postfix) with ESMTPSA id BBE4781B69; Thu, 13 Dec 2018 08:58:54 +0100 (CET)
SavedFromEmail: dario.rossi@telecom-paristech.fr
Date: Thu, 13 Dec 2018 08:58:43 +0100
In-Reply-To: <CAA93jw58CW6We3NCa=F60yqvCPuvOexpRJQWS6M_k_5WnXUmhw@mail.gmail.com>
Importance: normal
From: "dario.rossi" <dario.rossi@telecom-paristech.fr>
To: Dave Taht <dave.taht@gmail.com>, bloat <bloat@lists.bufferbloat.net>, Cake List <cake@lists.bufferbloat.net>, aqm@ietf.org
Cc: Work <dario.rossi@huawei.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="--_com.samsung.android.email_4509317196705380"
Message-Id: <20181213075854.BBE4781B69@zproxy110.enst.fr>
Archived-At: <https://mailarchive.ietf.org/arch/msg/aqm/R4TA5JmqUEAKgQ_YrCCuKq-q2RQ>
Subject: Re: [aqm] paper: per flow fairness in a data center network
X-BeenThere: aqm@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Discussion list for active queue management and flow isolation." <aqm.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/aqm>, <mailto:aqm-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/aqm/>
List-Post: <mailto:aqm@ietf.org>
List-Help: <mailto:aqm-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/aqm>, <mailto:aqm-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 13 Dec 2018 07:59:02 -0000

Ciao Dave (&all)
While I'd love to do a bit more on the topic, I recently joined Huawei, and while I still work on networking,  this one is not so aligned with my current set of activities... 
so I cannot unfortunately help moving forward :/
Best,D.
PS fyi Also I tend to read this email less freqiently than @huawei
Sent from my new-but-still-not-so-smart-phone. Excuse my typos and its random fixes
Oo   Chair holder NewNet@Paris  >    Professor, Telecom ParisTech~     Professor, Ecole Polytechnique 

-------- Original message --------From: Dave Taht <dave.taht@gmail.com> Date: 12/6/18  04:18  (GMT+01:00) To: bloat <bloat@lists.bufferbloat.net>, Cake List <cake@lists.bufferbloat.net>, aqm@ietf.org Subject: paper: per flow fairness in a data center network 
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 Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740

v2.23.0 | Report a Bug | By Email