[Cake] A few puzzling Cake results

Georgios Amanakis gamanakis at gmail.com
Wed Apr 18 12:34:47 EDT 2018


Would making it active only for the 'ingress' mode be an option?

Otherwise it has to be documented that when using ingress mode with lots of
bulk flows on <20mbit/s the actual goodput is going to be less than the set
one (eg for 9.8mbit/s set, 5.3 mbit/s actual).

On Wed, Apr 18, 2018, 12:25 PM Dave Taht <dave.taht at gmail.com> wrote:

> I would like to revert this change.
>
> On Wed, Apr 18, 2018 at 9:11 AM, Toke Høiland-Jørgensen <toke at toke.dk>
> wrote:
> > Jonathan Morton <chromatix99 at gmail.com> writes:
> >
> >>> On 18 Apr, 2018, at 6:17 pm, Sebastian Moeller <moeller0 at gmx.de>
> wrote:
> >>>
> >>> Just a thought, in egress mode in the typical deployment we expect,
> >>> the bandwidth leading into cake will be >> than the bandwidth out of
> >>> cake, so I would argue that the package droppage might be acceptable
> >>> on egress as there is bandwidth to "waste" while on ingress the issue
> >>> very much is that all packets cake sees already used up parts of the
> >>> limited transfer time on the bottleneck link and hence are more
> >>> "precious", no? Users wanting this new behavior could still use the
> >>> ingress keyword even on egress interfaces?
> >>
> >> Broadly speaking, that should indeed counter most of the negative
> >> effects you'd expect from disabling this tweak in egress mode. But it
> >> doesn't really answer the question of whether there's a compelling
> >> *positive* reason to do so. I want to see a use case that holds up.
> >
> > What you're saying here is that you basically don't believe there are
> > any applications where a bulk TCP flow would also want low queueing
> > latency? :)
> >
> > -Toke
> > _______________________________________________
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>
>
>
> --
>
> Dave Täht
> CEO, TekLibre, LLC
> http://www.teklibre.com
> Tel: 1-669-226-2619
> _______________________________________________
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>
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