Accession Number : ADA188354

Title :   The TempIS Project: Performance Analysis of Temporal Queries,

Corporate Author : NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF COMPUTER SCIENCE

Personal Author(s) : Ahn, Ilsoo ; Snodgrass, Richard

PDF Url : ADA188354

Report Date : 11 Aug 1987

Pagination or Media Count : 29

Abstract : Temporal databases maintaining history data on line extend conventional databases with capabilities for historical queries and rollback operations. To analyze the performance of temporal queries on the database using various access methods, the authors propose a model consisting of four transformations through a series of intermediate expressions based on characteristics of database/relations and storage devices. They validate the model by comparing the I/O cost estimated from the analysis using the model with the actual cost measured from a prototype temporal DBMS. Since conventional databases are subsets of temporal databases, the model can also be used to analyze the performance of conventional databases. Keywords: Transformations(Mathematics); Access; Data storage systems; Computer files.

Descriptors :   *DATA BASES, *SYSTEMS ANALYSIS, *MATHEMATICAL MODELS, ACCESS, COMPUTER FILES, COSTS, DATA STORAGE SYSTEMS, PERFORMANCE TESTS, INPUT OUTPUT PROCESSING, INTERROGATION, TRANSFORMATIONS(MATHEMATICS)

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE