摘要
在移动环境下,为了满足实时事务在移动主机断接后数据的可用性,在事务启动前,数据必须收集到移动主机的缓存中。根据实时事务的相关性,给出了实时事务的相关图。介绍了基于时间阈值、空间阈值、数据的有效期阈值的收集算法,有效保证数据的可用性和实时事务的定时限制。
In a mobile environment, mobile hosts may disconnect from server frequently. To meet the data availablility during mobile hosts are disconnected, data items accessed by transaction must be hoarded to mobile host. A relation graph of real-time transaction is defined in this paper. According to the relation graph,data hoarding algorithms based on time limit, room limit and validity limit are proposed. Using the algorithms, avaibilitiy of data and the timing constraints of real-time transaction are met.
出处
《计算机应用研究》
CSCD
北大核心
2005年第3期97-100,共4页
Application Research of Computers
关键词
移动计算
实时事务
事务相关图
数据收集
Mobile Computing
Real-time Transaction
Transaction Relation Graph
Data Hoarding