Access Control and Retrieval Optimization Functions of the Supervisor for an Extended Data Management Facility
MOORE SCHOOL OF ELECTRICAL ENGINEERING PHILADELPHIA PA
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The purpose of the Supervisor in an Extended Data Management Facility EDMF is to direct the Facilitys handling of a users request for service. The Supervisor fulfills its task through the use of five main functions access control, retrieval initialization, file searching, record validating and record formatting. The major and most important component of the retrieval initialization phase is the retrieval optimization subfunction. The report is concerned mainly with the design and implementation of the access control and retrieval optimization functions. Macro instructions are the mechanism through which a users program can call upon the EDMF. The authority item check is the EDMFs security control over file access while the prime keyword search is the method used to optimize the retrieval strategy. The authority item check and the prime keyword search are two of the major concepts of the Extended Data Management Facility.
- Information Science
- Computer Programming and Software