介绍了一种基于数据多映像的并发控制协议，从而大大提高事物执行的并发度，更好的满足实时事物的截止期。-Introduced a multi-image based on data concurrency control protocol, thus greatly improving the implementation of the concurrency of things, better things to meet the real-time deadline.

国家精品课程，主要讲述了数据库的并发控制，内容为：（1）并发操作带来的数据为一致，（2）并发控制的主要技术——封锁 （3）封锁协议 （4）死锁和活锁-National quality courses, mainly about database concurrency control: (1) concurrent operation to bring the data is consistent, and (2) concurrency control technology- the bloc