移动广播环境中有效处理实时只读事务  

Efficient real-time processing for read-only transaction in mobile broadcast environments

作　　者：雷向东[1] 赵跃龙[1] 陈松乔[1] 袁晓莉[1] 

机构地区：[1]中南大学信息科学与工程学院,长沙410083

出　　处：《计算机应用》2007年第8期2062-2065,共4页journal of Computer Applications

基　　金：国家教育部博士点基金资助项目(20030533011)

摘　　要：提出了移动广播环境中有效处理实时只读事务的方法。给出了多种多版本广播磁盘组织。采用多版本机制,实现移动只读事务无阻塞提交。通过乐观方法,消除移动只读事务和移动更新事务的冲突。使用多版本动态调整串行次序技术,避免了不必要的事务重启动。在移动主机上如果移动只读事务通过向后有效性确认,则可提交,不需要提交到服务器处理,降低移动只读事务的响应时间。通过模拟仿真对提出的方法进行了性能测试,实验结果表明新方法要优于其他协议。The new method processing mobile real-time read-only transactions was proposed in mobile broadcast environments. Various multiversion broadcast disk organizations were introduced. Mobile read-only transactions could be committed with no-blocking by multiversion mechanism. The conflicts between mobile read-only and mobile update transactions could be eliminated by optimistic method. To avoid unnecessary restarts of transactions, multiversion dynamic adjustment of serialization order was adopted. If a read-only transaction passed all the backward validation in MH, it could be committed without contacting with the server. Response time of mobile read-only transactions was greatly reduced. The results of simulation experiment show that the new method performs better than other protocols.

关 键 词：移动实时数据库系统 移动只读事务 多版本乐观并发控制 多版本动态调整 有效性确认 多版本数据广播 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]