偏斜广播的两层可串行化移动实时并发控制

Concurrency control for two level mobile real-time transactions in screw data broadcasting systems

针对偏斜数据广播系统,提出两层移动实时事务模型,允许把移动实时事务分解为多个事务帧,以便以帧为粒度更精细地管理移动实时事务操作的并发执行.提出可动态调整帧串行化顺序的并发控制协议BCCDSS,避免不必要的帧夭折,尽可能早地在移动客户机端检测帧数据冲突,并减少须夭折的帧操作,让须夭折的移动事务帧尽早夭折,从而大大提高移动实时事务处理效率.对BCC-DSS协议的性能进行了评价,结果表明BCC-DSS协议能显著改进无线移动实时事务的平均响应时间、重启率和超期率.

For skewed data broadcasting system,two layer mobile real-time transaction model was proposed at first,and the mobile real-time transaction was decomposed into multiple affairs frame,in order to managing concurrent mobile real-time transaction operations in frame more finely executed.Then,concurrency control protocol BCC-DSS was proposed,which can be complicated by,as far as possible to avoid unnecessary frame died,as early as possible in the frame data between mobile client end detection,and as much as possible to reduce the mortality of frames need operation,make the mobile transaction frames that need to abort restart as soon as possible,so as to greatly improve the efficiency of mobile real-time transaction processing.Finally,the performance of BCC-DSS protocol was evaluated.The experimental results show that,the wireless mobile real-time transaction BCC-DSS protocol can significantly improve the average response time,restart rate and overtime rate.