自适应的时空多样性联合调度策略设计

Design of self-adaptive spatio-temporal diversity joint scheduling strategy

为了解决多样性系统在单一多样性策略下存在防御能力、防御代价和服务质量难以兼顾的问题,首先基于调度异构性、执行体安全性和空间多样性度量方法构造不同安全等级下的调度对象选择序列;然后根据对威胁环境的粗粒度评估,综合决策调度时机以及调度对象。通过在云环境下实现时空多样性Web服务系统,对所提调度策略进行攻防实验测试,并与已有调度策略进行了对比。结果显示,所提调度策略在可接受的防御代价增长范围内,显著提高了系统的防御能力,同时维持了较高的服务质量。

To solve the problem that a diversity system is difficult to take defense capability,defense cost and quality of service into account at the same time under a single diversity strategy,firstly,the scheduling object selecting sequences under different security levels were constructed based on the measurement of scheduling heterogeneity,executor security and spatial diversity.Then,according to the coarse-grained evaluation of threat environment,the scheduling time and scheduling object were determined comprehensively.Through the realization of the spatio-temporal diversity Web server system in a cloud environment,the proposed scheduling strategy was tested with attack and defense experiments and compared with the existing scheduling strategies.The results show that the proposed scheduling strategy improves the defense capability significantly and maintains a high quality of service within the acceptable defense cost increasing range.