DISTRIBUTED DATABASE-SYSTEMS IN HIGH-SPEED WIDE-AREA NETWORKS

In a distributed database system (DDBS), the data are partitioned into smaller databases and distributed over multiple sites in a computer n etwork. Associated with a DDBS are functions like query processing and concurrency control. Traditionally in DDBS research, the computer net work has been considered a performance bottleneck, and much research e ffort has been directed towards the design of database operations that minimize the data transmission cost. With the development of high-spe ed networks, the network transmission costs go down and new algorithms that efficiently utilize the huge bandwidth available are required. I n this paper, we first identify the issues involved in developing this distributed application in a high-speed environment. Then we demonstr ate the inadequacy of existing database protocols in utilizing the gig abit network. And finally, we develop a new concurrency control protoc ol that performs better than traditional DDBS in a high-speed network. Both analytical and simulation results are presented. In this paper, we have concentrated on the concurrency control (CC) aspect of DDBS si nce this protocol is at the heart of the overall functioning of the di stributed system.