[glue-wg] Fwd: GLUE2.0's Computing Element

[Sergio Andreozzi]

Gerson Galang wrote:
> Can anyone of the 9 members of the GLUE WG answer my question below? We 
> just want to be sure that the current information we are publishing are 
> still supported by the new GLUE schema.

all your questions are good ones and they require us a little more 
thinking. As a placeholder, we have added use case no.32 for your email:

http://forge.ogf.org/sf/wiki/do/viewPage/projects.glue-wg/wiki/UseCases

we'll come back to you next week with the answers.

Cheers, Sergio

> 
> Thanks.
> 
> ---------- Forwarded message ----------
> From: *Gerson Galang* <gerson.sapac at gmail.com 
> <mailto:gerson.sapac at gmail.com> >
> Date: May 29, 2007 4:30 PM
> Subject: GLUE2.0's Computing Element
> To: glue-wg at ogf.org <mailto:glue-wg at ogf.org>
> 
> Hi all,
> 
> Can you show me how to represent the setup I have below using the new 
> structure of the GLUE 2.0 entities?
> 
> - our site manages 2 clusters
> - each cluster runs a PBS queuing system
> - each queueing system manages three queues: small, medium, large
> - globus is installed on a separate box -- called the gateway box. we 
> run only one instance of the GRAM service on this box. anyone running a 
> grid job at our site will have to specify the 
> name-of-queue at name-of-pbs-server in the queue element of their RSL to 
> pick which queue they want to submit their jobs to.
> 
> It is not mentioned anywhere in the InitialSketch wiki ( 
> http://forge.gridforum.org/sf/wiki/do/viewPage/projects.glue-wg/wiki/InitialSketchOnEntities) 
> that the CE is still an abstraction of a queue. The relationship of a 
> ComputingService to a CE is also many to one which makes it hard for one 
> GRAM service to be able to submit jobs to a number of CEs (if ever a CE 
> is still equivalent to a queue). Does this mean that we will have 
> redundant info for the ComputingResource, ExecutionEnvironment, and 
> ApplicationEnvironment for every GRAM service (for each queue) we provide?
> 
> Is it safe to assume that the ComputingResource, ExecutionEnvironment, 
> and ApplicationEnvironment entities in GLUE 2.0 are equivalent to the 
> Cluster, SubCluster and Software entities of GLUE 1.3 respectively?
> 
> You have a comment in the form of a question under the "element" section 
> of the wiki which says: "can we have multiple resources (computing 
> resources <=> clusters) served by the same service instance?". My answer 
> is yes and isn't my use case above an example of it?
> 
> Thanks,
> Gerson
> 
> 
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-- 
Sergio Andreozzi
INFN-CNAF,                    Tel: +39 051 609 2860
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