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From "Mattmann, Chris A (388J)" <chris.a.mattm...@jpl.nasa.gov>
Subject Re: Query-CAS thread
Date Mon, 16 Jan 2012 17:10:35 GMT
Hi BW,

On Jan 15, 2012, at 10:44 PM, B W wrote:
>> 
>> But, what predicates the use of CAS over a Profile Service?

Read only versus Read/Write. Profile Servers, Product Servers, 
Query Services, and the like are information integration components
that federate distributed, virtual data systems. They don't put any 
data back in. CAS not only reads from underlying data sources, 
and queries them, but it writes back into them too.

> 
> So, if the query is first injected in a web-grid Profile Service?

Not always, depends on how you entered the system, some folks
go to CAS directly.

Cheers,
Chris

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Chris Mattmann, Ph.D.
Senior Computer Scientist
NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
Office: 171-266B, Mailstop: 171-246
Email: chris.a.mattmann@nasa.gov
WWW:   http://sunset.usc.edu/~mattmann/
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Adjunct Assistant Professor, Computer Science Department
University of Southern California, Los Angeles, CA 90089 USA
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


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