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

[Dave Berry]

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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