NDLI: An index organization for applications with highly skewed access patterns

Content Provider	ACM Digital Library
Author	Hultén, Christer
Abstract	The conventional way of organizing indices in large data base systems is to use balanced tree structures such as B-trees or static tree structures, e.g. ISAM. It is well known in practice that most applications do not have a uniform record reference distribution but rather the 80/20-rule or Zipf's law applies. The balanced index implementations mentioned do not exploit these skewed access patterns. This paper, which is an extract from the author's Ph.D.-thesis, proposes a data structure - the C-tree - which is designed to exploit the skewness of such access distributions with the intent of obtaining short response times for transactions accessing the index. An analytical model of the proposed structure and a B-tree is used for making a comparative evaluation of the structures. Conclusions are drawn and discussed with regard to the circumstances under which the proposed structure outperforms the B-tree.
Starting Page	71
Ending Page	78
Page Count	8
File Format	PDF
ISBN	0897911466
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1981-03-09
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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An index organization for applications with highly skewed access patterns