PERFORMANCE IMPLICATIONS OF REVERSE CHAINS WITH CHAINED PROGRESSIVE OVERFLOW FILES ...

• Main Author: Bradley, James
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: University of Calgary 1984
• Subjects: Computer Science; The Pointers
• Online Access: https://dx.doi.org/10.11575/prism/30454; https://prism.ucalgary.ca/handle/1880/46275

The conventional method of loading overflow records in a hash file employing chained progressive overflow requires that the overflow records be loaded as a linked list, with the pointers pointing to the next record of the list. The paper deals with a variation, called reverse chaining, where records are loaded in the normal sequence but each record except the home address record points to the prior record of the chain. The home address record points only to the most distant record of the chain, so that performance is improved for record insertion since the entire chain does not have to be scanned. Other aspects of performance are not affected. An analysis of the performance implications shows that the improvement is significant. ...