Title :
A parallel algorithm for the differential maintenance of a transitively closed relation
Author :
Hameurlain, Abdelkader ; Morvan, Franck ; Huguet, Marie
Author_Institution :
Lab. IRIT, Univ. Paul Sabatier, Toulouse, France
Abstract :
A parallel algorithm to propagate the insertion or deletion of a set of tuples in a binary relation into a transitively closed concrete relation without complete recomputation of the transitive closure is presented. The parallel external closure operator is used to determine the tuples which have to be added or deleted from the concrete relation. A performance analysis for the parallel external closure algorithm, the parallel algorithm for the differential maintenance of a transitively closed relation, is presented. The analytical model for the performance analysis is based on the work by P. Valduriez and S. Khoshafian (1988). The performance analysis outlines the improvement in response time for the differential maintenance of a transitively closed relation in contrast to the recomputation of the transitive closure.<>
Keywords :
deductive databases; parallel algorithms; analytical model; deductive databases; deletion; differential maintenance; insertion; parallel algorithm; parallel external closure operator; performance analysis; transitively closed relation; Algorithm design and analysis; Batteries; Concrete; Costs; Deductive databases; Delay; Parallel algorithms; Performance analysis; Physics computing; Query processing;
Conference_Titel :
Computers and Communications, 1992. Conference Proceedings., Eleventh Annual International Phoenix Conference on
Conference_Location :
Scottsdale, AZ, USA
Print_ISBN :
0-7803-0605-8
DOI :
10.1109/PCCC.1992.200516
