Databases in mobile telecommunications have become more and more important due to growing data volumes. More efficient database solutions are needed to support temporal and logical consistency. This book presents a possible database architecture for the growing data dilemma. It presents a database architecture for IN and GSM data, and a performance analysis toolbox for transaction-based software. Using the presented architecture as a test case, a detailed queue model analysis is presented. The result of the analysis is twofold. The most important result is that even a complex transaction-based system may be analyzed accurately enough to get relevant and reasonable results with the toolbox. Second, it appears that parallel database architectures have a lot to offer in high-volume data environments.