Research On Mechanism Of Cloud Service Resources State Monitoring And Service Composition

Cloud computing has become the most important and popular topic in IT industry. It brings transformative innovations not only in the use and management area of IT resources, but also introduces a more broad application for the existed emerging technology. Cloud computing causes the rapid development of computer technology, and has greatly changed the structure of the IT industry. Cloud services will gradually replace the traditional manner of self-bought hardware, self-built systems and autonomous maintenance, which greatly changed the traditional structure of IT industry.Once the cloud computing platform is constructed, the key to guarantee the quality of cloud service depends on how to monitor the complicated and variant services on cloud platform. In most of the existing cloud monitoring systems, there is much service information that need to be collected and balanced, which leads to the frequent transformation between monitors and monitored resources. The large transformation cost makes deep influence to the normal operation of cloud platform and finally reduce the service quality. In this paper, we focus on how to monitor the cloud service resources state and analyze the index, architecture, data transformation and alarms of cloud service resources state. At last we study the influence of different composition mechanisms to cloud service.Cloud service resource contains local service resource and remote service resource. Local service resource primarily is IT infrastructure and remote service resource is mainly Web service. Traditional Web services which are based on SOA usually adopt RPC architecture, but there exist deficiencies such as low scalability, high coupling. The REST based on ROA is proposed, which well made up for the shortage. This paper analyzes the origins and development of REST, study the orchestration of heterogeneo-us services and put forward heterogeneous service mix compilation method which allows the system obtain better performance. Since single Web Service is often difficult to meet the needs, we combine separate Web Service into Web service composition in order to provide the required business functions in practical application. There are many categories of Web service composition, among which workflow-based Web service composition is the most widely used and the most mature one in current. However, workflow-based Web service composition is insufficient capacity to deal with complex flow. This paper attempts to apply asynchronous flow in web service composition to effectively simplify the development process and improve efficiency.