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Vertical Fragmentation and Allocation in Distributed Databases with Site Capacity Restrictions Using the Threshold Accepting Algorithm

  • Joaquín Pèrez
  • Rodolfo Pazos
  • Juan Frausto
  • David Romero
  • Laura Cruz
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1793)

Abstract

This paper presents an extension of the DFAR mathematical optimization model, which unifies the fragmentation, allocation and dynamical migration of data in distributed database systems. The extension consists of the addition of a constraint that models the storage capacity of network sites. This aspect is particularly important in large databases, which exceed the capacity of one or more sites. The Threshold Accepting Algorithm is a variation of the heuristic method known as Simulated Annealing, and it is used for solving the DFAR model. The paper includes experimental results obtained for large test cases.

Keywords

Heuristic optimization distributed database design 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Joaquín Pèrez
    • 1
    • 2
  • Rodolfo Pazos
    • 2
  • Juan Frausto
    • 3
  • David Romero
    • 4
  • Laura Cruz
    • 5
  1. 1.Instituto de Investigaciones Eléctricas 
  2. 2.Centro Nacional de Investigación y Desarrollo Tecnológico 
  3. 3.ITESM Campus Morelos 
  4. 4.Instituto de Matemáticas, UNAM 
  5. 5.Instituto Tecnológico de Cd. Madero 

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