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

Dave Taht <dave.taht@gmail.com> Sat, 15 December 2018 17:21 UTC

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From: Dave Taht <dave.taht@gmail.com>
Date: Sat, 15 Dec 2018 09:21:41 -0800
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Cc: Luca MUSCARIELLO <luca.muscariello@gmail.com>, Cake List <cake@lists.bufferbloat.net>, aqm@ietf.org, bloat <bloat@lists.bufferbloat.net>
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Subject: Re: [aqm] [Bloat] [Cake] paper: per flow fairness in a data center network
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Found the PDF. Much more readable.

https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-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 <dave@taht.net>; wrote:
>
> Luca Muscariello <luca.muscariello@gmail.com>; 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-series-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 <dave.taht@gmail.com>; 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 Täht
> >     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



-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740