[Pgi-wg] Definition of a Production Grid

[Oxana Smirnova]

Hi Laurence,

thanks for this mail; what you describe for EGEE is perfectly valid for 
NDGF and other ARC-based grids. I would still argue that X509 and VOMS 
are mere implementation details, but even these are common for these two 
kinds of grids.

I do not allude that other kinds of grids do not belong to PGI; however, 
we clearly can not provide on a short time scale a single recipe for all 
possible setups. Let's take one step at a time, in the good tradition of 
low-hanging fruits of GIN :-)

Cheers,
Oxana

Laurence Field пишет:
> Dear All,
> 
> The word Grid means different things to different people and this quite 
> frequently leads to misunderstandings and conflict. This is especially 
> true within OGF where people from many different domains and backgrounds 
> discuss "Grids".  While each and every definition themselves are as 
> valid as each other, trying to discuss a concept from two possibly 
> unrelated perspectives is quite difficult.
> 
> Before we move forward in the PGI activity we therefore need understand 
> what we mean by "Grid" and hence the problem we are trying to solve.  It 
> seems that in some recent threads the word "production" has cause some 
> disagreements as this word is more commonly used to reflect quality 
> rather than concepts.
> 
>  From my perspective I can try to define the core properties that I see 
> are key when describing the EGEE infrastructure. I would hope that 
> similar infrastructures with whom EGEE would like to interoperate would 
> have a similar description.
> 
> I would like to introduce the term "Muti-institutional infrastructures 
> for e-Science" which can be used to describe something with the 
> following properties.
> 
> 1) Multi-institutional.
> The EGEE infrastructure is composed by linking resources that reside at 
> autonomous academic institutes. The key concept here is the 
> administrative domain which maps to a real institute and that there is 
> more than one institute in the infrastructure.
> 
> 2) The Virtual Organization
> The main aspects that links these institutes is the drive to collaborate 
> in order to do science. The collaborations are defined by Virtual 
> Organizations.
> 
> 3) x509 Certificates and Proxies
> Users are identified by x509 certificates which are provided by CAs 
> accredited by the IGTF. Proxies are typically used to interact with 
> services.
> 
> 4) VOMS
> To identify which VO a user is belong to is by contacting VOMS. VOMS 
> also supports Roles an Groups within the VO which is implemented by 
> adding attributes to the proxy.
> 
> 5) Multiple Services
> The are many different types of services each of which can define their 
> own interfaces which may or many not be a Web Service.
> 
> 6) Parrallel Information System
> The information about services is found by querying an information 
> system which is not necessarily related to the service interface.
> 
> 6) Scale
> 100s of administrative domains, thousands of users, thousands of 
> services, millions of computing actives and petabytes of data.
>  
> This may be a can of worms but if we can agree on a set of properties 
> for what we mean by "Production Grid" it might help in the discussions. 
> I don't mean that anything that has different properties is not a 
> production grid, I just want to clarify what this group mean when it 
> talks about a Grid infrastructures.
> 
> Laurence
> 
> 
> Laurence
> 
> 
> 
> 
> 
> 
>  
> 
> 
> 
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