CAJ | 학술논문

资源监控是网格计算的关键组成部分.资源监控算法既要保证网格系统中资源信息高保真度又要考虑资源信息在网络传输中的负担最低.ACTC算法就是为实现以上目的而被提出,但是算法中对资源信息更新量的动态门槛值(d_threshold)计算方式不合理,有可能导致算法演变成低级的单纯依靠时间敏感机制(TSM)来发送资源更新通知,并且算法中遗漏了一些极端情况的考虑.提出了新的d_threshold计算公式和限制条件,进行性能改进和完善,并对改进前后两算法进行实验对比.实验表明,改进后算法提高了资源信息准确性,并使监控系统负担减轻.
자원감공시망격계산적관건조성부분.자원감공산법기요보증망격계통중자원신식고보진도우요고필자원신식재망락전수중적부담최저.ACTC산법취시위실현이상목적이피제출,단시산법중대자원신식경신량적동태문함치(d_threshold)계산방식불합리,유가능도치산법연변성저급적단순의고시간민감궤제(TSM)래발송자원경신통지,병차산법중유루료일사겁단정황적고필.제출료신적d_threshold계산공식화한제조건,진행성능개진화완선,병대개진전후량산법진행실험대비.실험표명,개진후산법제고료자원신식준학성,병사감공계통부담감경.
Grid resources monitoring is a key component of grid. Resources monitoring algorithm not only need ensure the high fidelity of the resources information, but also take account into the lowest burden in the network transmission. This paper proposed ACTC algorithm based on achieving this aim, however, the algorithm used a improper formula of calculating dynamic threshold amount of change for resource status(d_threshold), probability results to evolve into a inefficient algorithm sends resource update information based only on TSM, and ACTC don't take into account some special situation maybe happen in experiment. This paper put forward a new formula for calculating the value of d_threshold and add other limiting condition to perfect and improve the performance of ACTC algorithm, and comparing the original algorithm with the improved algorithm in the experiment. The experiment improves algorithm better on accuracy of resources information monitoring and alleviating the burden of monitoring system than former ACTC algorithm.