[ogsa-d-wg] Discovery Service - Returning Data

[Allen Luniewski]

Dave,

No problem - I guess that I misunderstood.  Obviously easy enough to take 
out the "return data" text.

I thought that the suggestion to return data was reasonable even though I 
doubt that this will be a common thing to do.

Allen




"Dave Berry" <daveb at nesc.ac.uk> 
Sent by: owner-ogsa-d-wg at ggf.org
03/16/2006 09:30 AM

To
<ogsa-d-wg at gridforum.org>
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Subject
RE: Re: [ogsa-d-wg] Discovery Service - Returning Data






Allen,
 
I'm also a bit concerned about this.  I apologise, because I didn't 
realise when we were discussing this on the call that you had taken the 
action to make this change - I was in too much of a hurry to move on to 
the next item.  My concern is that I don't know what it means to "return 
the data", in a context where we have several possible interfaces for 
accessing data, including ByteIO and the various DAIS specs, each of which 
operate on names.
 
I don't think I understand Dieter's suggestion sufficiently well to see 
how it would affect the overall architecture.  It certainly sounds an 
interesting idea and if we can incorporate it simply then that's all to 
the good, but I'd rather we had a longer talk with Dieter first.
 
Best wishes,
 
Dave.

From: owner-ogsa-d-wg at ggf.org [mailto:owner-ogsa-d-wg at ggf.org] On Behalf 
Of Allen Luniewski
Sent: 16 March 2006 16:59
To: ogsa-d-wg at ggf.org
Subject: Fw: Re: [ogsa-d-wg] Discovery Service - Returning Data


Peter's mail bounced. 

Allen

----- Forwarded by Allen Luniewski/Almaden/IBM on 03/16/2006 08:54 AM 
----- 


Message-ID: 
<20570961.451142526276621.OPEN-XCHANGE.WebMail.tomcat at sala.cscs.ch>
Date: Thu, 16 Mar 2006 17:24:36 +0100 (CET)
From: Peter Kunszt <pkunszt at cscs.ch>
To: ogsa-d-wg at ggf.org
Subject: Re: [ogsa-d-wg] Discovery Service - Returning Data



hi allen

i don't know.. i get an uneasy feeling when service discovery
is mixed with ontologies and content. to me, e.g. DNS is service
discovery already,
and certainly it does not give me the semantics or content of the
service. i
would separate any kind of content retrieval from service discovery, it
feels
'cleaner' for a SOA. otherwise i'm afraid service discovery will be too
large
a beast to manage..

just my swiss 2cents...

cheers
peter

-----Urspr=C3=BCngliche Nachricht-----
Von: owner-ogsa-d-wg at ggf.org im Auftrag von Allen Luniewski
Gesendet: Mi 15.03.2006 18:26
An: ogsa-d-wg at ggf.org
Betreff: [ogsa-d-wg] Discovery Service - Returning Data
=C2=A0
At today's call, I took on an action to update the discovery service
section to allow for discovery services that returned the data of
interest
rather than a reference to the data.=C2=A0 Here is the updated material 
for
your=C2=A0 consideration:
Resource Discovery
Discovery services are vital to the data architecture.=C2=A0 The data
services
may use the discovery services not just for registering services
themselves, but also for registering the data sets that are stored by
those services. This requires languages or ontologies for describing
data.
Discovery services may also register the locations of schema
definitions.
Discovery services may be built upon metadata repositories that contain
information about other entities in the grid such as resources, and
services.=C2=A0 Some discovery services may return the name of the service
and
some may return an EPR to the service.=C2=A0 Some discovery services may 
ta=
ke
a
description of the desired data as input and return the data itself.


Allen



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