This paper presents the common methods of remote data synchronization in computer information system.Under the large volume business scene of a transaction processing system,traditional data replication technology is limited by high network bandwidth.Therefore,we propose a real-time data synchronization method based on transaction message.The transaction messages of transaction processing system were classified as application level message redo logs,and the methods and strategies of packet decomposition and encapsulation,message synchronization and buffer pool management were adopted.Finally,the real-time synchronization target of business data was realized with very low line bandwidth.Through the implementation of disaster recovery case practice,we fully verified the feasibility and effectiveness of the method.The proposed method can significantly reduce the implementation cost of application-level disaster recovery in large traffic.%概括并分析了计算机信息系统中常见的异地数据同步方法.针对事务处理系统的大业务量场景,纯系统级的数据实时同步方法受限于线路带宽的制约.提出的基于交易报文的数据实时同步方法,将事务处理系统的交易报文归纳为应用级的报文重做日志,采用报文分解与封装、报文同步与缓冲池管理等方法与策略,以很低的线路带宽实现业务数据的实时同步目标.通过真实业务数据系统性的实验与分析,验证了方法的可行性与有效性.基于提出的方法,大业务量下应用级容灾备份的实现成本可显著降低.
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