Disk allocation methods for binary Cartesian product files

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26 Scopus citations

Abstract

Since a file is usually stored on a disk, the response time to a query is dominated by the disk access time. In order to reduce the disk access time, a file can be stored on several independently accessible disks. In this paper, we discuss the problem of allocating buckets in a file among disks such that the maximum disk accessing concurrency can be achieved. We are particularly concerned with the disk allocation problem for binary Cartesian product files. A new allocation method is first proposed for the cases when the number (m) of available disks is a power of 2. Then it is extended to fit the cases where m is not a power of 2. The proposed algorithm has a "near" strict optimal performance for a partial match query in which the number of unspecified attributes is greater than a small number (5 or 6).

Original languageEnglish (US)
Pages (from-to)138-147
Number of pages10
JournalBIT
Volume26
Issue number2
DOIs
StatePublished - Jun 1 1986

Keywords

  • Cartesian product files
  • D.4.2
  • D.4.3
  • D.4.8
  • H.3.3
  • disk allocation
  • file structures
  • multi-key hasing
  • partial match retrieval

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