移动计算中断连操作性能的改善方法

在移动计算环境中,断连后,移动客户机根据缓存的数据在本地执行事务,重新连接后,移动客户机中的事务作为暂态事务提交给固定主机重新执行.如果移动客户机与固定主机的读/写、写/写冲突机率很高,则暂态事务在固定主机上成功提交的概率就很低,大量的暂态事务就会夭折,这将浪费大量的服务器资源和通信资源,从而降低整个系统的性能.为了提高暂态事务重提交的成功概率,本文提出按概率提交暂态事务的方法.该方法在冲突频率非常高的场合,能够节省移动客户机的传送开销,减轻固定主机的负担,提高事务的吞吐量.

The Improving Method With Mobile Computing After Disconnection

With mobile computing,after disconnection,mobile clients execute transactions locally based on the cached data,after reconnection,the transactions in the mobile clients will be submitted as the tentative transactions to the stable hosts to re-execute.Using this method,if there's a high probability of read/write and write/write conflicts between mobile clients and stable hosts,the probability of successful submitting of the tentative transactions will be very low.Lots of abortion of tentative transactions will waste server and communication resources,reduce the performance of the whole system.In order to increase success probability for the re-submitting of tentative transactions,we provide a method to submit tentative transactions according to probability.If used in the environments with high conflicting probability,this method can save the costs of transmission on mobile clients,reduce the load on the stable hosts and improve the number of transactions the system can process.