Optimization of Memory Hierarchies in Multiprogrammed Systems
Journal of the ACM (JACM)
Some generalized modeling structures for use in design of file organizations.
Some generalized modeling structures for use in design of file organizations.
A clustering approach to the generation of subfiles for the design of a computer data base.
A clustering approach to the generation of subfiles for the design of a computer data base.
An attribute access probability determination procedure.
An attribute access probability determination procedure.
The Logical Record Access Approach to Database Design
ACM Computing Surveys (CSUR)
Statistice for the usage of a conceptual data model as a basis for logical data base design
VLDB '79 Proceedings of the fifth international conference on Very Large Data Bases - Volume 5
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Various procedures have been developed to select efficient storage structures; all of these procedures, however, require certain statistics to describe the use of attributes by problem programs. A very practical problem faced by anyone attempting to use any of these selection techniques is the determination of values for the attribute use statistics. This paper reports on one method which has been empirically tested for determination of attribute access probabilities. Central to this method is recognition of five kinds of statistic collection biases which are systematically considered by the proposed method but which do confound collection by previously developed methods. Finally, experimental results are reported which indicate specific comparative advantages of the proposed method over ones used by the DP staff of a medium-sized manufacturer.