计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2014年
12期
12-18
,共7页
云计算%树云环境%DAG任务调度%云资源安全%云资源信誉度%可用性偏离度
雲計算%樹雲環境%DAG任務調度%雲資源安全%雲資源信譽度%可用性偏離度
운계산%수운배경%DAG임무조도%운자원안전%운자원신예도%가용성편리도
cloud computing%tree cloud environment%DAG task scheduling%cloud resource security%cloud resource reputation%deviation of availability
在异构复杂的云环境中,任务调度时应保证资源的安全与可用性。为此,提出一种融合安全与可用性的DAG任务调度策略。改进主观逻辑信任模型,将计算出的资源信誉度作为调度的重要依据,对树云资源与DAG任务的可用性偏离度进行量化,给出调度函数并设计贪心调度算法( ISAG)。实验结果表明,在资源安全性和可用性较低的环境中,ISAG算法仍能满足用户需求,与表调度算法DLS和可用性优先调度算法Afsa相比,具有更高的任务执行成功率。
在異構複雜的雲環境中,任務調度時應保證資源的安全與可用性。為此,提齣一種融閤安全與可用性的DAG任務調度策略。改進主觀邏輯信任模型,將計算齣的資源信譽度作為調度的重要依據,對樹雲資源與DAG任務的可用性偏離度進行量化,給齣調度函數併設計貪心調度算法( ISAG)。實驗結果錶明,在資源安全性和可用性較低的環境中,ISAG算法仍能滿足用戶需求,與錶調度算法DLS和可用性優先調度算法Afsa相比,具有更高的任務執行成功率。
재이구복잡적운배경중,임무조도시응보증자원적안전여가용성。위차,제출일충융합안전여가용성적DAG임무조도책략。개진주관라집신임모형,장계산출적자원신예도작위조도적중요의거,대수운자원여DAG임무적가용성편리도진행양화,급출조도함수병설계탐심조도산법( ISAG)。실험결과표명,재자원안전성화가용성교저적배경중,ISAG산법잉능만족용호수구,여표조도산법DLS화가용성우선조도산법Afsa상비,구유경고적임무집행성공솔。
For the instability of security and availability of resource in the heterogeneous and complex cloud environment, a DAG task scheduling strategy is proposed to satisfy the demand for security and availability of cloud tasks, which is integrated with both security and availability in cloud computing environment. The strategy first modifies the subjective logical trust model to calculate the reputation of cloud resource that is the basis of scheduling, and then qualifies the availability deviation of tree cloud resource and DAG task,and finally defines the schedule function and greedy scheduling algorithm integrating with security and availability,called ISAG. Simulation results prove that ISAG can efficiently meet the requirement of tasks on cloud platform of low availability and low security, and gets better performance and higher execution success rate compared with DLS and Afsa.
