基于功能替代模型的无冲突并发控制协议  

Conflict-free Concurrency Control Protocol Based on Function Alternative Model

作　　者：夏家莉[1] 韩增波[1] 陈辉[1] 

机构地区：[1]江西财经大学软件学院,南昌330012

出　　处：《计算机工程》2010年第15期57-59,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60763002);江西省自然科学基金资助项目(2008GZS0021)

摘　　要：针对周期事务的功能替代模型,支持周期事务的无冲突并发控制协议(SP-CCCP)在CCCP的基础上,增加了新事务与准活跃高优先级周期事务的相容性检测,并改进其与当前活跃事务的相容性检测性能。SP-CCCP选取无冲突的相容替代执行,提高了系统的事务成功率和CPU利用率。仿真实验表明,在资源冲突程度较大的情况下,SP-CCCP的性能优于CCCP。Aiming at the function alternative model of the periodic transaction,Conflict-free Concurrency Control Protocol for Supporting Periodic transaction（SP-CCCP） which is based on CCCP,adds the compatible test between the new transaction and its future active periodic transaction with higher priority,and improves the performance of compatible test between the new transaction and the current active transaction.SP-CCCP selects the compatible alternative which has no conflict with other transactions,and improves success ratio of the system transaction and utilization ratio of the CPU.Simulation results show that in most situations,the performance of SP-CCCP is better than CCCP.

关 键 词：实时数据库系统 功能替代 周期事务 相容替代 

分 类 号：TN915.04[电子电信—通信与信息系统]