Folks,
We need a definition of how we are using
the term "data federation", for the OGSA glossary. Fortunately we
don';t have to find a definition that covers all the ways the term is
used in the world, just how we use it in our document. Following a
short discussion at the OGSA F2F, Jem (who is keeper of the glossary)
suggested the following;
The integration of
multiple data resources so that they can be
accessed as if they were a single resource.
Allen suggested that as we are accessing
data via services, this would be better phrased as follows (see the
attached message for Allen's explanation in his own words):
The integration of
multiple services or data resources so that they can be
accessed as if they were a single service.
We discussed this on yesterday's call and
the consensus was that I should post to the list and ask for your
comments.
We briefly discussed whether we should
separately define "data federation" and "data integration". One view
was that "integration" didn't necessarily involve distributed resources
while "federation" didn't necessarily involve integrating the resources
into a single view. The contrasting view was that integration almost
always involves distributed data in practice, and especially so in a
Grid context, while federation typically requires some way of accessing
the distributed data as a whole. So I'm leaning towards treated the
terms as synonyms within our documents.
What do you think?
Dave.
Dave: This is (very slightly) modified from
your document - though you don't have the glossary entry filled in :0)
The integration of
multiple data resources to so that they can be
accessed as if they were a single resource.
- Jem
Jem Treadwell
Hewlett-Packard Company
6000 Irwin Road
Mount Laurel, NJ 08054 |
|
Dave,
I guess that I am not comfortable
with
the use of the word "resource" below. I have always seen
this as the integration of data services. Since data resources are,
basically, opaque boxes in the data architecture, I simply do not know
what it means to integrate them (in a formal OGSA sense). Since a
federating service could very well have multiple data resources under
its
wings as well as having access to multiple data services. I would
suggest
changing "multiple data resources" to "multiple data resources
and/or services". And the "data resource" at the end
of the definition should, ti seems to me, be data service since it is
the
service that provides the architected access path the data in the data
resource.\
Allen
Hi Allen,
Jem asked for a definition
of
data federation for the OGSA Glossary v1.5. We should check that
we're happy with this (and update our own Glossary section).
Dave.
From: Treadwell, Jem
[mailto:jem.treadwell@hp.com]
Sent: 19 January 2006 23:17
To: Dave Berry
Subject: Data federation definition
Dave: This is (very slightly) modified
from
your document - though you don't have the glossary entry filled in :0)
The integration of multiple data resources
to so that they can be accessed as if they were a single resource.
- Jem
Jem Treadwell
Hewlett-Packard Company
6000 Irwin Road
Mount Laurel, NJ 08054
|
|