数据复制系统的主端IO策略研究  

Research of the primary IO strategy in data-replication system

作　　者：李劲[1] 

机构地区：[1]湖北民族学院信息工程学院,445000

出　　处：《微计算机信息》2006年第05X期263-265,共3页Control & Automation

基　　金：国家科技攻关计划项目(编号:2002BA901A02)

摘　　要：在数据复制系统中,主端IO策略必须在保证主端数据视图一致性和从端数据一致性的同时,提高主端请求响应速度。针对已有的主端IO策略中存在的各种缺陷,设计并实现了并行IO策略。在该策略中制定了五条规则,通过按照请求提交的顺序来返回请求成功及更新日志控制信息,保证了主端数据视图一致性和从端数据一致性的要求,同时它对请求进行了并行处理,大大提高了主端IO效率。In data replication systems, Primary IO strategy should improve the request response speed as well as ensure primary data view consistency and secondary data consistency. We design and implement parallel IO strategy to solve the insult3ciency of the existing strategy. In parallel IO strategy, we establish five rides. It finishes IO request and updates the log control message according to order of submitting, which ensures the primary data view consistency and secondary data consistency. At the same time, it handles requests in parallel, which improves the IO efficiency greatly in the primary.

关 键 词：数据复制 数据视图一致性 数据一致性 并行IO策略 

分 类 号：TP333[自动化与计算机技术—计算机系统结构]