关键词: 积分, 分布式数据库系统, 并发控制

Abstract: The Concurrency Control (CC) scheme employed in distributed database system can profoundly affect the performance of transaction-processing system. There are many different kinds of solutions to the problem of CC in distributed database system, and they have both advantages and disadvantages. The major methods of CC, basic knowledge of lock-based model and the project of 2-Phase Locking (2PL) were introduced. A score-based method was proposed based on lock-mechanism and in accordance with 2PL protocol, which could reduce the amount of data transmission and had desirable performance of concurrency. It could be used to deal with the problem of CC. The experimental results show that the proposed method can achieve much better performance than other available ones.

Key words: score, Distributed Database Management System (DDBMS), Concurrency Control (CC)