Research On Key Technologies For Active Service In Computing Environment-awareness

Due to cloud computing tasks are distributed in a large number of computing resource pool,a variety of application systems can obtain the computing power,storage space and information services according to users’ needs.This method has the characteristics of on-demand service,fast elastic architecture,virtual resource pool,measurable service,etc.According to the current popular cloud computing method,web services are showing explosive growth.The service requesters are difficult to grasp the dynamic change of service quality,and all of the service calls focused on a single service agent.As a result,that leads to computational problems.How to integrate and share all kinds of resources in the open,dynamic and changeable cloud computing environment is not only an important challenge,but also a great opportunity for the development of software technology.In order to solve the above problems,this paper proposes the active service based on environment perception.Active service is different from passive service,and Service selection,assembly and management of passive service are carried out by a unified service agent.The active service can undertake the task of real-time calculation of its service ability and service quality.Environmental awareness refers to the service with the change of time,environment change and the assembly plan,the performance and reliability will be different.Due to the active service has the function of understanding its own ability most comprehensive and clear,in this paper,we change the centralized and passive management to the service own perception.The main innovations include:(1)We propose a service selection method based environment-aware active service.The service dispatch center with the method of bidding and tendering to select services according to user requirement.Active services evaluate their own capabilities to ensure service quality and perceive failure services.And finally,establish an environment with high real-time and reliability.(2)We propose a method of active service combination.Active service compares the characteristics of its-self and demand,so as to judge whether it can meet user needs of its own.In order to realize the active aggregation and combination of active service based on the active service as the main body,the service demand as the goal.(3)We propose a method of active service access control strategy based on dynamic delegation.Active service control service accessibility autonomously and reduce the risk of leakage of the authentication information.(4)This paper realized the prototype development of the public service platform based on active service.The practical significance of this paper is to construct an active service cloud platform based on cloud environment perception,take the he animation digital production of public service platform as an example.To provide practical guidance and reference for the evaluation,selection and combination of services.