Online Data Structures in External Memory
WADS '99 Proceedings of the 6th International Workshop on Algorithms and Data Structures
Online Data Structures in External Memory
ICAL '99 Proceedings of the 26th International Colloquium on Automata, Languages and Programming
Algorithms and data structures for external memory
Foundations and Trends® in Theoretical Computer Science
Algorithms for memory hierarchies: advanced lectures
Algorithms for memory hierarchies: advanced lectures
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Extendible hashing is an attractive direct-access technique which has been introduced recently. It is characterized by a combination of database-size flexibility and fast direct access. This paper derives performance measures for extendible hashing, and considers their implecations on the physical database design. A complete characterization of the probability distribution of the directory size and depth is derived, and its implications on the design of the directory are studied. The expected input/output costs of various operations are derived, and the effects of varying physical design parameters on the expected average operating cost and on the expected volume are studied.