[Bloat] bbr on slashdot

[Dave Taht]

Hi hal. long time no see.


On Sat, Nov 2, 2019 at 4:38 PM Hal Murray <hmurray at megapathdsl.net> wrote:
>
>
> Sebastian Moeller said:
> > Interestingly, the naive expectation in the vice text is equal sharing
> > between all concurrent flows, if only we had a system that could actually
> > help achieving this kind of set-up that is fair to each flow...
>
> Is there consensus on what a flow is?  Or what the unit of traffic that
> fairness measures should be?
>
> It seems to me that it depends on where you are located.
>
> Consider upstream traffic:
>
> If I'm a workstation or server, I probably want to give equal weight to each
> connection.
>
> If I'm an exit router at a residence, I probably want to give equal weight to
> each IP Address.  If not, pigs can game the system by making multiple
> connections.  But if I have a server, maybe I want to reserve or limit the
> bandwidth it gets - reserve to keep the workstation/laptop traffic from
> killing the server and limit so the workstation/laptop people can get some
> work done when the server is busy.
>
> If I'm an ISP customer facing router, I probably want to give equal weight to
> each customer, probably scaled by how much bandwidth they are paying for.
>
> I don't know how to handle backbone routers.  You probably want to treat each
> customer as a flow, again scaled by how much bandwidth they are paying for.
> But an IP level packet doesn't tell you anything about which customer it came
> from.
>
> If this is old news, please point me at a good writeup.

I *think* we handled the majority of these use cases in the design of cake.

https://arxiv.org/pdf/1804.07617.pdf

somewhat missing from these is that we also want *really good multiplexing*.

>
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
> _______________________________________________
> Bloat mailing list
> Bloat at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat



-- 

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