Migrating databases via distributed relational database operations-The Hubble Space Telescope approach

Details Migrating databases via distributed relational database operations-The Hubble Space Telescope approach Migrating databases via distributed relational database operations-The Hubble Space Telescope approach

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aipc..283..513s&link_type=abstract

The earth and space science information system (ESSIS). AIP Conference Proceedings, Volume 283, pp. 513-526 (1993).

Computer Science

Databases

Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc.

Scientific paper

The Hubble Space Telescope (HST) and ground system produce data sets that are archived onto an optical disk juke-box system. A smaller HST Catalog exists to describe and manage access to the archived data. Users request data sets via keyword searches of the Catalog. The searches return pointers to corresponding archived file names.
The HST Catalog is populated by data from several external databases via the Ingest program. The topologies of the external databases and the Catalog are inherently different because they were designed to maximize utility in their own contexts. Therefore, when importing data, Ingest normalizes and/or joins rows of multiple external database tables and writes the new rows to the Catalog. Secondarily, Ingest parses data values, translates data values, and creates row identifiers for each row to be written to the Catalog. The Ingest process is driven by translation tables residing in the Catalog database and are alterable on-the-fly.
Ingest has proven to be a powerful tool in the HST environment where functional requirements are many, database structures are enormous and both evolve rapidly.

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