On Sun, Jan 15, 2012 at 11:06 AM, Mattmann, Chris A (388J) < chris.a.mattm...@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.mattm...@nasa.gov > WWW: http://sunset.usc.edu/~mattmann/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Adjunct Assistant Professor, Computer Science Department > University of Southern California, Los Angeles, CA 90089 USA > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > >
