Title :
Parallel bidirectional heuristic search with dynamic process re-direction
Author :
Toptsis, Anestis A.
Author_Institution :
Dept. of Comput. Sci. & Math., York Univ., UK
Abstract :
Non-wave shaping parallel bidirectional heuristic search algorithms have been reported to suffer of the bidirectional search anomaly. Although wave-shaping is considered as the most natural approach, parallel bidirectional wave-shaping algorithms are extremely scarce. We introduce a wave-shaping algorithm for parallel bidirectional heuristic search in distributed memory environments. The method is inspired by the celebrated uniprocessor bidirectional wave-shaping algorithm of DeChampeaux-Sint (1977). Our performance evaluation shows that the proposed method scales well, maintains good performance for increasing problem sizes, and attains close to linear speedup over the sequential DeChampeaux-Sint algorithm
Keywords :
heuristic programming; parallel algorithms; search problems; DeChampeaux-Sint algorithm; bidirectional search anomaly; distributed memory environments; dynamic process redirection; parallel bidirectional heuristic search algorithms; wave-shaping; Artificial intelligence; Computer science; Costs; Educational institutions; Heuristic algorithms; Joining processes; Mathematics; Parallel processing;
Conference_Titel :
Parallel Processing Symposium, 1994. Proceedings., Eighth International
Conference_Location :
Cancun
Print_ISBN :
0-8186-5602-6
DOI :
10.1109/IPPS.1994.288294
