On Fri, Jul 19, 2013 at 12:55 AM, Sebastian Kiesel <[email protected]>wrote:
> Richard,
>
> sure. we should get it done ASAP. but i am wondering whether we can ever
> reach consensus if we have different understandings what a server is.
>
> if you believe this is an academic discussion and the issue can be
> resolved without a definition, forget my question ...
>
If it helps, here's how I would interpret it and why:
RFC 5693 defines the following:
ALTO Service: Several resource providers may be able to provide the
same resource. The ALTO service gives guidance to a resource
consumer and/or resource directory about which resource
provider(s) to select in order to optimize the client's
performance or quality of experience, while improving resource
consumption in the underlying network infrastructure.
ALTO Server: A logical entity that provides interfaces to the
queries to the ALTO service.
The protocol draft states the following:
In this architecture, an ALTO Server prepares ALTO Information; an
ALTO Client uses ALTO Service Discovery to identify an appropriate
ALTO Server; and the ALTO Client requests available ALTO Information
from the ALTO Server using the ALTO Protocol.
The ALTO Protocol is a RESTful protocol which is built upon links
between resources. As such, I interpret ALTO Server in the way that
Richard Yang mentioned earlier (analogous to "website").
> Sebastian
>
>
> On Fri, Jul 19, 2013 at 12:42:40AM -0700, Richard Alimi wrote:
> > As one of the editors who needs to ensure this draft gets done ASAP, we
> > need to close on this issue of dependencies in which we discussed having
> > multiple network maps per server. We opened a thread on June 20th asking
> > for input on a proposal and received positive feedback. Based on the
> > responses, we implemented what we believed satisfied the discussion
> there.
> >
> > I recognize that there are different opinions here, but we need to have a
> > single conclusion that can go into the draft. Can the chairs help us to
> > come to a consensus here?
> >
> > Thanks,
> > Rich
> >
> >
> > On Thu, Jul 18, 2013 at 1:30 PM, Sebastian Kiesel <[email protected]
> >wrote:
> >
> > > Wendy,
> > >
> > > Thanks for answering! I know that this might be the starting point for
> > > a longer discussion thread but I feel it has to be done ...
> > >
> > > My approach for finishing the costmap discussion would be based on two
> > > steps:
> > >
> > > 1. Agree on a definition what "an ALTO server" is
> > >
> > > 2. Optionally add furhter constraints/rules/requirements for "an ALTO
> > > server" as defined in step 1.
> > >
> > >
> > >
> > > -----
> > >
> > > For step 1, my feeling is that the definition should be related to
> > > the IRD, as this is also the result of the discovery procedure.
> > >
> > > My proposal
> > > > "An ALTO Server is an IRD with a given URI, plus all the information
> > > > resources listed therein"
> > > would allow it to distribute an ALTO server over multiple boxes,
> > > processes, etc.
> > >
> > >
> > > For step 2, we *could* then add the constraint that an IRD may only
> > > list one network map. I can understand your arguments below, but
> > > I still need to think about it for a short while.
> > >
> > >
> > > Does this make sense to you?
> > >
> > > Thanks
> > > Sebastian
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Thu, Jul 18, 2013 at 04:07:51PM -0400, Wendy Roome wrote:
> > > > Thanks for asking!
> > > >
> > > > Personally, I prefer to think of "an ALTO Server" as *one* network
> map
> > > and
> > > > all the cost map resources associated with that network map. If an
> > > > organization offers several network maps, fine! They just offer
> several
> > > > ALTO Servers.
> > > >
> > > > Note that "ALTO Servers" are orthogonal to "boxes" or "hostnames".
> One
> > > > "ALTO Server" can span many physical hosts. Or several "ALTO
> Servers" can
> > > > use the same box. That's up to the provider. The IRD gives the
> provider a
> > > > lot of flexibility. Our examples not withstanding, nothing says that
> all
> > > > services advertised in one IRD have to be on the same host.
> > > >
> > > > Here's why I prefer that over the current scheme of multiple network
> maps
> > > > within one server:
> > > >
> > > > * If there are multiple network maps, the client must be configured
> with
> > > > the id of the desired network map, as well as the uri of the IRD. If
> > > > there's one network map per server, the client just needs the uri of
> the
> > > > IRD. Thus the "one network map" interpretation pushes the 'id' of the
> > > > network map into the uri of the IRD. Isn't one of the tenants of
> "REST"
> > > > that resources should be identified by uris?
> > > >
> > > > * If an ALTO server has multiple network maps, the cost-map services
> are
> > > > partitioned by network map. There are no interactions between them,
> and
> > > no
> > > > advantage to folding them together. The client picks the network map
> it
> > > > wants, and ignores the cost services associated with other maps.
> > > >
> > > > * Draft 17 adds a lot of baggage to partition the set of services by
> > > > network map. If a server has one network map, none of that is
> necessary.
> > > >
> > > > Okay, Sebastian, I was going to keep my big mouth shut. But you had
> to
> > > ask!
> > > >
> > > > - Wendy Roome
> > > >
> > > >
> > > > On 07/18/2013 15:43, "[email protected]" <[email protected]>
> > > wrote:
> > > >
> > > > >Message: 2
> > > > >Date: Thu, 18 Jul 2013 21:18:16 +0200
> > > > >From: Sebastian Kiesel <[email protected]>
> > > > >To: alto <[email protected]>
> > > > >Subject: [alto] What is an ALTO server?
> > > > >Message-ID: <[email protected]>
> > > > >Content-Type: text/plain; charset=us-ascii
> > > > >
> > > > >Dear all,
> > > > >
> > > > >at a first glance the the question may seem strange, but reading the
> > > > >recent discussions on Costmap IDs / IRD structures, I'm wondering
> how
> > > > >we define "an ALTO server"?
> > > > >
> > > > >- A physical box? (hopefully not!)
> > > > >
> > > > >- The software process that listens on <IPaddress>:80/tcp and/or
> > > 443/tcp ?
> > > > >
> > > > >- All the information resources that are listed in an IRD with
> > > > > a given URI?
> > > > >
> > > > >What do you think?
> > > > >
> > > > >Thanks
> > > > >Sebastian
> > > > >
> > > > >
> > > >
> > > >
> > > > _______________________________________________
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> > > > [email protected]
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> > >
>
>
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