[Bloat] when does the CoDel part of fq_codel help in the real world?

[Luca Muscariello]

If you have multiple flows the BDP will change as measured at the end
points.
Also the queue occupancy has to accommodate the overshoot. If you have a
BDP in flight plus
epsilon you should not size based on the long term value but on the
overshoot.
If you don't have space for it, the long term value may be even larger.

On Thu, Nov 29, 2018 at 8:55 AM Dave Taht <dave.taht at gmail.com> wrote:

> On Wed, Nov 28, 2018 at 11:45 PM Jonathan Morton <chromatix99 at gmail.com>
> wrote:
> >
> > > On 29 Nov, 2018, at 9:39 am, Dave Taht <dave at taht.net> wrote:
> > >
> > > …when it is nearly certain that more than one flow exists, means aiming
> > > for the BDP in a single flow is generally foolish.
> >
> > It might be more accurate to say that the BDP of the fair-share of the
> path is the cwnd to aim for.  Plus epsilon for probing.
>
> OK, much better, thanks.
>
> >  - Jonathan Morton
> >
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>
>
> --
>
> Dave Täht
> CTO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-831-205-9740
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