摘要： 懒散复制分布式数据库系统的事务可以在不同节点上执行，如果其先后顺序不能得到保证，则会产生“脏数据”问题，甚至导致整个系统数据的不一致。针对以上问题，采用基于时标戳的并发控制思想，在懒散复制的分布式数据库中实现Strong Session 1SR，保证事务的执行顺序。该方法可以防止“脏数据”问题，达到较高的并发度。

关键词: 时标, 懒散复制, 事务控制

Abstract: In lazy replication Distributed Database System(DDBS), transactions may be executed at different node, if the ordering of them can not be guaranteed, they may rise the problem of “dirty data”and may result in inconsistent of the whole database system. This paper uses concurrency control techniques based on timestamp to implement Strong Session 1SR that is suitable for use with lazy replication, and to guarantee the ordering of some transactions. It can avoid “dirty data”, and get high concurrence rate.

Key words: timestamp, lazy replication, transaction control

中图分类号: 

• TP311