| At present,the rapid development of cloud computing and virtualization and the wide use of hybrid cloud architecture have brought new carriers of data and business to the government and enterprises,and provided a solid foundation for their information construction,and promoted the process of cloud in the data and business of government and enterprises.Government and enterprises have diverse and differentiated needs in cloud environment application,and cloud environment becomes more and more complex.The construction and deployment of private cloud and public cloud also bring the widespread use of hybrid cloud architecture,while hybrid cloud also brings the problems faced by heterogeneous multi-cloud when meeting the different needs of builders.Virtual machine,as the service unit and basic carrier of cloud service in a multi-cloud environment,directly determines the cloud service quality used and perceived by users.Therefore,this paper chooses virtual machine service quality as the research object to evaluate virtual machine QoS,so as to judge the quality of cloud service used by users.In this paper,the influencing factors of VM QoS are selected and divided into VM configuration indicators that are easy to quantify and VM attributes that are not easy to quantify.User when choosing to buy cloud,a cloud service provider may occur due to budget performance causes too much waste or purchase according to the experience and subjective judgment,etc.,aiming at this problem,this paper proposes a user-oriented cloudy environment evaluation model of virtual machine QoS,nonlinear evaluation by gradient descent algorithm,the virtual machine performance assessment of the quantitative indicators,at the same time,The hard to quantify attributes of virtual machines are evaluated,and the correlation between the hard to quantify attributes of virtual machines and the evaluation of quantitative indicators is verified through experiments,and the two are integrated into the virtual machine QoS evaluation model in a multi-cloud environment.In order to solve the problem of VM QoS evaluation in a multi-cloud environment,provide cloud service users with a reference quantitative basis.In this paper,comparative experiments and qualitative analysis are designed to evaluate the virtual machine QoS,and the gap between the calculated value and the marked value of QoS is calculated.Then,the correlation analysis between the virtual machine attribute annotation and the calculated QoS value is conducted to prove the correlation between the virtual machine attribute evaluation and the virtual machine QoS quantifiable index evaluation. |
