Performance Evaluation for Data Fragmentation Method in Distributed Database Systems

摘要

Data fragmentation technique improves the performance of the system throughput and reduces the amount of irrelevant data to be accessed and transferred among different sites in Distributed Database systems (DDBs). We propose a database fragment generating method that splits the database relations into pair-wise disjoint fragments, which would be allocated to the DDBs sites during the process of allocation. This method guarantees the ability of processing a given portion of a given transaction in all sites, and improves the query processing performance by minimizing the fragments access cost. We developed an interactive interface application based on our proposal method to generate the application segments, and produce the minimum number of fragments. Some results in tabular and graphical means will be presented to demonstrate the efficiency of the method.