[orep-wg] WS-ReplicaCatalog specification

[Peter Kunszt]

hi ann,

very well, then the 'scope' section needs some revisiting
first. these are the very first sentences of the document.
it reads:

"The focus of this specification is to introduce a WS-ReplicaCatalog to
supplement the Replica Location Service (RLS) by providing a WS-RF
interface to the functionality of a replica catalog. "

  this is what i meant, it says explicitly that 
  this doc is meant to supplement the RLS
  with WSRF. so if it is true what you write 
  in your email, please drop this phrase or
  phrase it better, i.e.

  ''The focus of this specification should be to 
  introduce a WS-ReplicaCatalog specification 
  that fits into the general OGSA data area 
  definition of replica cataloguing functionality.''

  there are already references to replica catalogs 
  in the RNS and GFS specs, i think we should be doing
  exactly what is necessary to interoperate there

"Within the RLS there exists a Local Replica Catalog (LRC) service along
with a Replica Location Index (RLI). The WS-ReplicaCatalog addresses the
functionality one expects from a replica catalog hence the scope is
narrowed to the functionality found in the LRC. "

  this is as specific as it gets. i would 
  make no such assumption at all! it should mention
  the GFS and RNS work in the OGSA data design. 

"There would likely exist a complementary WS-ReplicaIndex specification
to encompass the functionality of the RLI, but it is not addressed in
this document. "

  more specifics, i suggest to simply drop it.


it continues throughout the first few pages as i mentioned in my initial
email,
so if your intentions were to have it generic, i am afraid it doesn't
show (at least to me).
all of it needs serious revisiting to show that intention and much
better ties to the existing OGSA data
work. i can help you with that if you want.

peter


> -----Original Message-----
> From: Ann Chervenak [mailto:annc at ISI.EDU] 
> Sent: 05 August 2005 19:10
> To: Steve Crumb
> Cc: Peter Kunszt; Robert Schuler; orep-wg at ggf.org; newby at arsc.edu
> Subject: Re: [orep-wg] WS-ReplicaCatalog specification
> 
> 
> Hi,
> 
> While there may be some RLS-specific stuff in the 
> introduction that should be generalized, there is no 
> intention to make this application-specific or specific to a 
> particular catalog. It is intended to provide general replica 
> catalog functionality. And purpose of sending it to the OREP 
> group is to get comments from the community on how to make it 
> sufficiently general.
> 
> Ann
> 
> 
> Steve Crumb wrote:
> 
> > Peter, All,
> >
> > Might I also suggest that if this document is application specific 
> > (sorry, I've not read the document), and submission as a 
> > rcommendations track document is not in order (as Peter implies), 
> > that you consider submitting this as an Experimental document.  GGF 
> > has four types of documents and one usage of an Experimental type 
> > document is to submit (for broader review by the community) a more 
> > specific implementation for consideration (and abstraction) toward 
> > defining a recommendation track document.
> >
> > Steve
> >
> > At 10:34 AM 8/5/2005, Peter Kunszt wrote:
> >
> >> hi rob and ann,
> >>
> >> without wanting to sound rude or out of place, please allow me to 
> >> tell you that in my opinion the current scope definition of the 
> >> document and also the introduction is not suitable for a GGF 
> >> standardization document.
> >>
> >> it cannot be that a standard is tied to a very specific 
> >> implementation of a very specific product. a standard should be a 
> >> just the pure interface definition with its semantics defined, so 
> >> that every group that intends to implement the standard, 
> can do so in 
> >> a well-defined way. its scope has to be addressing a 
> well-defined set 
> >> of requirements in a specific manner, and it also has to mention 
> >> explicitly what it does not define, and how it relates to other 
> >> efforts.
> >>
> >> currently the document's first few pages read like an 
> introduction to 
> >> a work plan for the 'WSRF-ification' of the globus RLS, 
> not like the 
> >> intro to a GGF standards doc.
> >>
> >> just my 2c,
> >>
> >> peter
> >>
> >> ps. other than this immediate general one, i have also technical 
> >> comments - coming soon ;-)
> >>
> >>
> >>
> >> ----------
> >> From: owner-orep-wg at ggf.org [mailto:owner-orep-wg at ggf.org] 
> On Behalf 
> >> Of Robert Schuler
> >> Sent: 05 August 2005 02:56
> >> To: orep-wg at ggf.org
> >> Cc: annc at isi.edu; Robert Schuler
> >> Subject: [orep-wg] WS-ReplicaCatalog specification
> >>
> >> Hello OREP WG members,
> >>
> >>
> >>
> >> Ann and I would like to share with you a draft specification for a 
> >> WS-ReplicaCatalog interface. The intention is to define a WS-RF 
> >> interface for a Replica Catalog, similar in functionality 
> to existing 
> >> replica catalogs (e.g., the RLS Local Replica Catalog service). As 
> >> you know, the earlier OREP specification treated replica 
> information 
> >> as individual resources and was an extension of the 
> WS-ServiceGroup 
> >> specification. While that approach lends itself to fine-grain 
> >> manipulation and inspection of replica location 
> information, it lacks 
> >> the concept of "bulk" operations that are so important for 
> >> scalability. It is also more difficult to digest some of its 
> >> concepts. In this new specification, the interface should be 
> >> conceptually similar to the interface provided by existing replica 
> >> catalog services (e.g., RLS LRC, and others). We also expect that 
> >> this interface will be complementary to the earlier work 
> on the OREP 
> >> spec, though it does not depend on it in any way.
> >>
> >>
> >>
> >> If you find time to review it, we certainly would like to 
> hear your 
> >> thoughts, suggestions, and comments.
> >>
> >>
> >>
> >> Cheers,
> >>
> >>
> >>
> >> rob
> >>
> >>
> >
> >
> > Steve Crumb
> > Executive Director, Global Grid Forum
> > +1 630-252-8610 (Office)
> > +1 630-915-3324 (Cell)
> > scrumb at ggf.org
> 
>