A Method for Fragment Allocation Design in the Distributed Database Systems

The fragment allocation design is an essential issue that improves the performance of the applications processing in the Distributed Database systems (DDBs). The database queries access the applications on the distributed database sites and should be performed effectively. Therefore, the fragments that accessed by queries are needed to be allocated to the DDBs sites so as to reduce the communication cost during the applications execution and handle their operational processing. We present a method for grouping the sites of the DDBs according to their communication cost in order to determine the fragment allocation to a group of sites instead of allocating the fragments to site by site. Optimizing the cost of the fragment allocation functions to reduce the queries processing time and determining the fragments to be allocated in the DDBs sites are also main objectives in our research.