一种基于数据库复制技术的分布式联机方案

针对一般分布式方案中存在的不足，构建了一个基于数据库复制技术的分布式系统。这个系统的各级服务器都自带数据库，数据采用集中更改的方式，避免了分布式更改所带来的数据一致性冲突；同时服务器之间采取事务复制技术，及时将集中更改的数据反映到各订阅服务器，满足了数据的及时同步。客户端采取本地数据库查询，提高了系统响应速度。整个系统的数据传输量小，反映速度快，既保证了各服务器的数据一致性，又能满足客户的及时性要求。

A Distributed Online Project Based on Database Replication Technique

Aiming at the shortage on normal distributed project, this paper puts forward a kind of distributed system based on database replication technique. All servers of this system have own database. The data adopts concentrative change, which avoids the conflict of data consistency because of distributed change. And servers adopt transaction replication, which reflects promptly the data changed to subscribe servers and meet real-time synchronization of the data. Clients adopt native query, which improves reflection speed of the system. In the whole system, the flow is little and the speed is fast, which both avoid the conflict of data consistency and meet timely request of customers.