Due to the recent expansion of network bandwidth, the data propagation delay has become a significant factor which influences the system performance in place of the data transmission delay. Based on this fact, we have proposed a new technology to reduce the bad influence of propagation delay on the performance of distributed database system by relocating dynamically the database through networks, which we call database migration. Furthermore, we have proposed a database relocation method to choose the transaction processing method between the conventional database fixed method and the proposed database migration method by giving consideration to the transaction complexity. In this paper, we explain our distributed database system with database migration mechanism based on these proposals, and the implementation of the DB-MANalpha system as a prototype system. The DB-MANalpha system reduces the database migration time by using a main memory database technique, which induces us to add a backup management mechanism for migratory databases. Moreover, we show some measurement results for the performance evaluation of the DB-MANalpha system. The results show that the implemented system works well in a practical environment.
|Cite as: Akiyama, T., Sakai, S., Umigai, A., Hara, T., Tsukamoto, M. and Nishio, S. (2002). Design and Implementation of DB-MAN Alpha: Does Database Migration Work Well in a Real Environment?. In Proc. Thirteenth Australasian Database Conference (ADC2002), Melbourne, Australia. CRPIT, 5. Zhou, X., Ed. ACS. 23-31. |
(local if available)