【摘要】 嵌入式环境下实时内存数据库系统发生故障时要求能快速恢复,检验点策略是实时内存数据库恢复的关键技术.本文基于一个自主开发的嵌入式实时内存数据库原型系统ART-,提出一种支持该系统故障恢复的模糊检验点策略,并给出两种故障恢复时重做起点的确定策略.通过性能测试表明:所提出的检验点策略及重做起点的确定策略能提高实时事务满足截止期的比率,提高了整个系统的性能.更多还原

【Abstract】 The failure recovery of the real-time main memory database system needs the rapid recovery in the embedded environment,checkpointing is an important recovery technique of real-time main memory database.A fuzzy checkpointing strategy based on the ART-Ⅱ(an active real-time main memory database)is suggested,and two types of redo point strategies for this checkpointing strategy are also developed.The performance test shows that this checkpointing strategy and the redo point strategies can increase the ratio of the transactions meeting the deadline and the performance of the system.更多还原