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From B W <b.du...@gmail.com>
Subject Re: Query-CAS thread
Date Mon, 16 Jan 2012 06:44:37 GMT
On Sun, Jan 15, 2012 at 11:06 AM, Mattmann, Chris A (388J) <
chris.a.mattmann@jpl.nasa.gov> wrote:

> Hi BW,
>
> On Jan 15, 2012, at 8:33 AM, B W wrote:
>
> > What are the circumstances for which CAS becomes is involved in a Query?
>
> Typically CAS is queried by any of the following use cases:
>
> 1. An operator/user is searching for data to download, browse metadata
> for, etc.
> They typically do this through our web applications (CAS Browser, CAS
> Curator,
> OPSUI, etc.).
>
> But, what predicates the use of CAS over a Profile Service?

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

2. In an automated fashion, the CAS PGE task wrapper queries the File
> Manager
> portion of CAS to determine files to stage, deliver, and their associated
> metadata.
>
> 3. By the Push Pull system and by the Crawler to determine Product
> uniqueness.
>
> ...and some others.
>
> >
> > When the Query includes observation events that have been registered with
> > CAS in some time frame in the past?
>
> That's one of the use cases, yes, per the above.
>
> 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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