[openstack-dev] [Openstack-sigs] [FEMDC] [Edge] [tripleo] On the use of terms "Edge" and "Far Edge"

Jim Rollenhagen jim at jimrollenhagen.com
Thu Oct 18 21:43:29 UTC 2018


On Thu, Oct 18, 2018 at 4:45 PM John Fulton <johfulto at redhat.com> wrote:

> On Thu, Oct 18, 2018 at 11:56 AM Jim Rollenhagen <jim at jimrollenhagen.com>
> wrote:
> >
> > On Thu, Oct 18, 2018 at 10:23 AM Dmitry Tantsur <dtantsur at redhat.com>
> wrote:
> >>
> >> Hi all,
> >>
> >> Sorry for chiming in really late in this topic, but I think $subj is
> worth
> >> discussing until we settle harder on the potentially confusing
> terminology.
> >>
> >> I think the difference between "Edge" and "Far Edge" is too vague to
> use these
> >> terms in practice. Think about the "edge" metaphor itself: something
> rarely has
> >> several layers of edges. A knife has an edge, there are no far edges. I
> imagine
> >> zooming in and seeing more edges at the edge, and then it's quite cool
> indeed,
> >> but is it really a useful metaphor for those who never used a strong
> microscope? :)
> >>
> >> I think in the trivial sense "Far Edge" is a tautology, and should be
> avoided.
> >> As a weak proof of my words, I already see a lot of smart people
> confusing these
> >> two and actually use Central/Edge where they mean Edge/Far Edge. I
> suggest we
> >> adopt a different terminology, even if it less consistent with typical
> marketing
> >> term around the "Edge" movement.
> >
> >
> > FWIW, we created rough definitions of "edge" and "far edge" during the
> edge WG session in Denver.
> > It's mostly based on latency to the end user, though we also talked
> about quantities of compute resources, if someone can find the pictures.
>
> Perhaps these are the pictures Jim was referring to?
>
> https://www.dropbox.com/s/255x1cao14taer3/MVP-Architecture_edge-computing_PTG.pptx?dl=0#


That's it, thank you!

// jim


>
>
> I'm involved in some TripleO work called the split control plane:
>
> https://specs.openstack.org/openstack/tripleo-specs/specs/rocky/split-controlplane.html
>
> After the PTG I saw that the split control plane was compatible with
> the type of deployment discussed at the edge WG session in Denver and
> described the compatibility at:
>
> https://etherpad.openstack.org/p/tripleo-edge-working-group-split-control-plane
>
> > See the picture and table here:
> https://wiki.openstack.org/wiki/Edge_Computing_Group/Edge_Reference_Architectures#Overview
> >
> >> Now, I don't have really great suggestions. Something that came up in
> TripleO
> >> discussions [1] is Core/Hub/Edge, which I think reflects the idea
> better.
> >
> >
> > I'm also fine with these names, as they do describe the concepts well. :)
> >
> > // jim
>
> I'm fine with these terms too. In split control plane there's a
> deployment method for deploying a central site and then deploying
> remote sites independently. That deployment method could be used to
> deploy  Core/Hub/Edge sites too. E.g. deploy the Core using Heat stack
> N. Deploy a Hub using stack N+1 and then deploy an Edge using stack
> N+2 etc.
>
>   John
>
> >>
> >> I'd be very interested to hear your ideas.
> >>
> >> Dmitry
> >>
> >> [1] https://etherpad.openstack.org/p/tripleo-edge-mvp
> >>
> >> _______________________________________________
> >> openstack-sigs mailing list
> >> openstack-sigs at lists.openstack.org
> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-sigs
> >
> >
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