摘要
1.引言
所谓事务就是可以保持数据库一致性的任何原子操作序列.操作可以是对数据库实体的读或写.为了一组事务可以同时执行,要引入并行控制机制[3],以保证多个事务对数据库操作后,数据库仍保持一致性.
The concurrency control problem in database systems has been examined by many people and several concurrency control algorithms have been proposed. The most popular algorithms are two-phase locking and timestamp ordering. Due to its inefficiency in some situations, we propose the optimized method which is combined of timestamp ordering and optimistic method. With this method, the efficiency can be improved in those systems where the conflicts between transactions rarely happen.
出处
《计算机科学》
CSCD
北大核心
2003年第10期172-174,共3页
Computer Science
关键词
数据库系统
优化
并行控制算法
数据对象
事务处理
Transaction, Concurrency controls, Databases, Timestamp ordering, Optimistic method, Optimized method
