云服务传递网络的多业务可信部署方法

The mutual interference phenomenon among multiple applications delivered as services through Cloud Services Delivery Network (CSDN) influences their QoS seriously. In order to deploy multiple applications dependably and efficiently, we propose theMultipleApplicationsCo Exist (MACE) method.MACE classifies multiple applications into different types and deploys them using isolation to some extent. Meanwhile, resource static allocation, dynamic supplement and resource reserved mechanism to minimize mutual interference and maximize resource utilization are designed. AfterMACE is applied to a real large scale CSDN and evaluated through 6 month measurement, we find that the CSDN load is more balanced, the bandwidth utilization increases by about 20%, the multiple applications potential statistical multiplexing ratio decreases from 12% to 5%, and the number of complaint events affecting the dependability of CSDN services caused by multiple applications mutual interference has dropped to 0. Obviously, MACE offers a tradeoff and improvement for the dependability and efficiency goals of CSDN.     

云际分布记账模型、机理与关键技术展望

云际计算是支持公有云、私有云、边缘云和微云等异源异质云服务以自主对等方式纵横协作共赢的新型计算模式,可为独立云服务实体间行为交互、信任构建和贡献度量等提供防篡改、可追溯能力支持,进而最大限度削弱阻碍不同利益攸关者协作的不确定性因素.提升云际协作意愿和效率需要基于何种机理进行何种机制创新,是云际计算成长演化中需要进一步阐述的新问题.本文首先以基于“数字空间证据”构建或增强信任关系为设计原则,提出了基于区块链的云际分布记账软件定义模型,并系统阐述了分布记账支撑云际服务独立性、可审计性以及释放云际协作潜能的内在机理;其次,面向云际复杂交互行为,深化并固化了云际分布记账运行逻辑流程及关键环节的设计,避免其在错综复杂要素综合作用下呈现不确定冲突和矛盾;再次,针对数据要素流通及复杂异步交互场景,细化并优化了云际分布记账合约逻辑模型;最后,论述了以分布共识、智能合约等为代表的云际分布记账核心技术及相应指标的现状,并对关键技术的目标属性体系、前瞻性挑战等进行了展望.