【摘要】 在借鉴数据库系统以及数据容灾系统的基础上,针对现有日志技术无法解决日志大小限制的问题,设计了一种基于位图的日志溢出保护机制。围绕数据一致性、原子操作机制分析了这个溢出保护机制的实现流程,比较了该机制与传统机制的优越性。原型实验表明,该机制有效地解决了由于网络拥塞或者I/O请求数量突然增加造成的日志溢出问题,为数据复制提供了保障。更多还原

【Abstract】 On the basis of the database system and data disaster tolerance system,a bitmap-based log overflow protection mechanism was designed due to the problem of the size limitation in the current log technology.We discussed the implementation of the mechanism from data consistent and atomic operation,and analyzed the superiority of the mechanism compared with traditional log technology.It’s proved by the prototype that the mechanism effectively resolves the log overflow problem due to network congestion and sudden increment of I/O requests,thus data replication can be guaranteed.更多还原