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From: Dave Taht <dave.taht@gmail.com>
To: Forums1000 <forums1000@gmail.com>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] The bigger picture: what components are used together to fight bloat
Date: Sat, 4 May 2013 13:56:41 -0700	[thread overview]
Message-ID: <CAA93jw6ZUDxRoHmf3eOqdaH6m5dA3rKH1RfrtTM1D8XSqQkW3Q@mail.gmail.com> (raw)
In-Reply-To: <CANfPCkWVpg9d0C=pJ7X5pp9Ohquxfh+WUPBgGVNA6z1nT_PS-w@mail.gmail.com>

On Thu, May 2, 2013 at 4:44 AM, Forums1000 <forums1000@gmail.com> wrote:
> I hope I can get a bit more information on what comprises the total
> solution. But knitting it together proves a bit hard (for me at least).
> Without this, it is hard to follow the discussions on the list. Has anyone
> made a summary of how all of this works together?
>
> So:
>
> 1. In order to move the bottleneck to a device under our administrative
> control, we need to shape traffic (we need to become the bottleneck).

Or the algorithms need to be running on the bottleneck device.

> 2. Next, we have the AQM-algorithms that manage the (or a) queue.
> 3. And then there are still issues with multiple flows and with UDP?
>
> From what I understand, we need to shape traffic, and then drop packets
> taking into account that the most aggressive flow (the flow that contributes
> the most to filling a buffer), is the flow that will get the most packets
> dropped. This to prevent the aggressive flow from impacting flows that
> behave better.

There are often many aggressive flows and it doesn't help to just
shoot at one or drop a ton of packets from one, inside of an RTT.

>
> Now for UDP, is the problem here that we cannot identify flows, and hence,
> only have one queue for UDP whereas for TCP we can have multiple?

Not true. Using a 5 tuple for udp works as well as it does for tcp.

> Any good resources are more than welcome:-)!

http://www.bufferbloat.net/projects/cerowrt/wiki/Bloat-videos

>
> Thanks,
> Jeroen
>
> _______________________________________________
> Bloat mailing list
> Bloat@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat
>



-- 
Dave Täht

Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html

      parent reply	other threads:[~2013-05-04 20:56 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-02 11:44 Forums1000
2013-05-04 19:24 ` Kevin Gross
2013-05-04 20:56 ` Dave Taht [this message]

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