Performance issues in distributed query processing

The performance of the Local Reduction algorithm, the Fragment and Replicate Strategy (FRS) algorithm and the Partition and Replicate Strategy (PRS) algorithm, which have a significant bearing on the performance of distributed query processing, is tested and analyzed. These algorithms' decisions as to the local functions to be executed, the relation that should stay fragmented or the relation that should be partitioned, have been validated. The performance of PRS is greatly influenced by the number of processing regions, partitioning speed compared to join speed and the sizes of the join reactions.