[glue-wg] Core entities

[Fisher, SM (Steve)]

Sergio,

With the need to address the relationship between resources and services
I had something like the attached in mind. I don't want to argue about
individual attributes yet. It may be useful to associate an attribute
with the service to service relationship - this may become evident from
the use cases. This will allow you to not only say that a service is
related but how it is related.

I then have the CE as a service and a cluster as a resource. I suspect
that we will want to mimimise the set of resources related to a service
- I don't think you want to see every worker node directly.

With this view a site is simply a provider of services. 

Steve

 

> -----Original Message-----
> From: Sergio Andreozzi [mailto:sergio.andreozzi at cnaf.infn.it] 
> Sent: 03 May 2007 12:10
> To: Fisher, SM (Steve)
> Cc: glue-wg at ogf.org
> Subject: Re: [glue-wg] GLUE WG phoneconf - 3 May - 4 PM CEST
> 
> Hi Steve,
> 
> Fisher, SM (Steve) wrote:
> > Sergio,
> > 
> > I can attend at this time for one hour - if anybody cares 
> to tell me how
> > to phone in.
> 
> I will send the details to the list shortly.
> 
> > I am supposed to be responsible for the service stuff in 
> GLUE and that
> > the schema proposed here is a step back from what we have 
> now and will
> > mess up what we are trying to do with service discovery in 
> SAGA. It does
> > not "incorporate the concepts of GLUE 1.3" I had missed the document
> > when it was first announced on the 3rd April as the subject said
> > "focusing on the CE".
> > 
> > What do you suggest, should I propose an alternative? I 
> don't want to
> > start the public discussion at OGF20 with your definition 
> of service.
> >
> > As part of the OGF20 meetings we will probably have to 
> revisit the issue
> > of what we mean by optional parameters. This discussion 
> dried up a while
> > ago but it was never resolved. I still insist that the 
> logical modelling
> > has nothing to do with what the implementers/sys-admins may 
> choose to
> > publish.
> 
> consider that the document is an early draft. The main attempt was to 
> merge GLUE 1.3 and NorduGrid schema into a common proposal with no 
> backwards-compatible constraints. The main focus was the computing 
> element for which me and Balazs are responsible.
> 
> As regards the Core schema, this was put just as a placeholder and is 
> not yet a precise merge of the two (e.g., service data is 
> missing). You 
> have complete freedom of changing it in order to make it aligned with 
> SAGA view before entering the real discussion.
> 
> Together with the .png files you can find the UML source code for the 
> ArgoUML software.
> 
> Cheers, Sergio
> 
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