[occi-wg] Question about OCCI Model

[Andy Edmonds]

Hey Ralf,

>From my reasoning on the model contained within the core specification, I
arrived at this UML model rendering [1], which was part of the OCCI
Implementer and Integrator presentation at OGF28 [2]. Do note that a) the
relationships are SLA at SOI specific and so too is the class
"ProvisionRequest".

To your first question, for me it would be very useful and expressive for
categories to form an acyclical directed graph and as such the category
relationship would be M:M. This is what we'll do in the SLA at SOIimplementation.

Regarding your second question, yes a Resource (kind) can be assigned to
many different categories but do note, as a minimum, it must be associated
with it's Kind category (compute, storage, network). In the
SLA at SOIimplementation, we create a kind and associate it with, amongst
others, a
compute and virtual category. Doing this allows us to describe our physical
and virtual infrastructure "landscape" without little change to the model.

HTH,

Andy
andy.edmonds.be

[1] http://dl.dropbox.com/u/165239/eu.slasoi.infrastructure.occi.png
[2] http://dl.dropbox.com/u/165239/occi-impl-guide.pdf

On Wed, Mar 31, 2010 at 15:28, Ralf Teckelmann (
Ralf.Teckelmann at hs-furtwangen.de) <Ralf.Teckelmann at hs-furtwangen.de> wrote:

>  Hello everybody,
>
>
>
> I have some little questions about the OCCI Model descripted in
> occi-core.pdf and occi-infrastructure.pdf.
>
> I'm looking at the abstract "levels" of this model at the moment.
>
>
>
> This is what I got from these papers:
>
> We have the resources as concrete entities at the lowest level in the tree.
> These resource are grouped in categories. A Category belongs to a certain
> scheme. And on the top of the Model is the "Root" allowing multiply schemes.
>
> Or in a top-down way: / --> scheme (1..n) --> category (3..n)--> resource
> (0..n)
>
>
>
> What I can't adept is:
>
> Is it possible to have sub-categories within a category?
>
> Let's say I want to build a little structure below the "Compute" category
> within the (Standard) "Kinds" scheme. For example I have 2 different forms
> (avoiding the word kinds) of computing resources I want to structure into 2
> sub-categories.
>
>
>
> Can a resource be part of multiple categories?
>
> Let's say I have a couple of resources, which are grouped under the
> "Compute" category, but I also want them to have a place or appear below
> another category of another scheme.
>
> For example I want to have my own scheme reflecting my virtual
> infrastructure in any way, so my VMs should appear in both schemes. In one
> as pure VMs and in the other one for example in relation to other resources
> (e.g. as part of a cluster).
>
>
>
> Best regards,
>
> Ralf
>
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>
>
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