海洋云服务流形式化描述与系统实现

发布时间：2017-12-28 07:16

本文关键词：海洋云服务流形式化描述与系统实现　出处：《上海大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着我国海洋信息化进程的不断发展,海洋信息系统在处理海量的海洋信息中扮演着关键角色,然而目前我国海洋经济的发展仍处于薄弱阶段,海洋经济占全国GDP比重只有10%左右,因此大力发展海洋经济对于我国有着重要的经济意义和战略意义。为了给我国海洋事业的发展提供有力的信息保障和技术支撑,国家海洋局实施了“数字海洋”项目,建成了大量海洋业务应用系统。这些系统在促进我国海洋事业发展的同时也越来越多的显现出资源占用多、运行成本高、缺乏系统规划和系统维护困难等问题。国家海洋局拟用新兴的云计算与云服务技术整合现有海洋环境信息系统建立一个最终用户按需提供服务、绿色节能、高效的海洋环境信息云计算平台。云计算的发展促使基于云平台的Web服务技术与工作流技术相互结合,使得基于海洋信息云环境的资源共享与服务集成成为海洋信息化建设应用领域的现实需求。由于海洋环境信息数据资源的异构性、分散性和多样性等特点,缺乏柔性的工作流模型并不能完全适应海洋环境信息动态、松耦合的要求。本文以海洋云服务流形式化描述与系统实现为内容,以工作流技术为基础实现服务的动态组合,并设计实现了动态服务流,其中,将服务流解析为流中子服务及它们之间的依赖关系,其动态、分布、松散耦合的主要特征能够适应海洋环境信息任务的需求。本文的主要工作和创新点如下:一、对海洋环境信息云服务流的交互协议及前后端交互机制进行了研究,设计实现了服务流模型,制定了交互协议的标准规范。二、在分析海洋环境云计算与云服务整体功能的需求基础上,进行了海洋云平台的整体架构设计。设计并实现了服务流引擎,它负责控制与协调诸计算模型的执行,服务流的解析与重组、服务流的调度。三、设计并实现了服务流监控模块及服务流运行机制中的关键算法PRSF,以最高的并行效率和最低的处理开销执行服务流。结合服务流前后端交互接口,实现了监控模块的核心——任务执行进度抽取器。四、最后搭建原型示范系统,初步实现了海洋环境信息云平台下服务流系统。通过乘潮水位和海洋环境信息可视化两种典型应用对原型示范系统进行测试。实验从整体上验证了平台和系统的功能实现,证明了海洋云平台服务流系统可以有效的、灵活的、可伸缩的处理云平台服务流任务并在处理大规模数据时有较高的优势,有较高的服务流执行效率。
[Abstract]:With the continuous development of China's marine informatization process, plays a key role in the marine information system of marine information processing mass, however, the development of marine economy in China is still in the weak stage, only about 10% of marine economy accounted for the proportion of GDP, therefore, vigorously develop the marine economy in China has important economic and strategic significance. In order to provide strong information support and technical support for the development of China's marine industry, the State Oceanic Administration has implemented the "Digital Ocean" project, and has built up a large number of marine business application systems. These systems not only promote the development of China's marine industry, but also more and more problems such as resource occupation, high operation cost, lack of system planning and system maintenance. The State Oceanic Administration is going to integrate the existing cloud computing and cloud service technology to integrate the existing marine environmental information system, and create an environmental service cloud computing platform for end users to provide services on demand, green, energy-efficient and efficient. The development of cloud computing has prompted the integration of Web services technology and workflow technology based on cloud platform, making the integration of resource sharing and service based on marine information cloud environment become the practical demand of marine information construction application area. Due to the heterogeneity, dispersion and diversity of marine environmental information data resources, the lack of flexible workflow models can not meet the requirements of dynamic and loose coupling of marine environment information. In this paper, the formal description of marine cloud services and system implementation for content, based on workflow technology to realize dynamic combination of service based, and the design and implementation of dynamic service flow, which will service flow analysis for dependency relationships between neutron and their services, the main features of dynamic, distributed and loosely coupled to the marine environmental information requirement. The main works and innovations of this paper are as follows: first, the interaction protocol and the front and rear interaction mechanism of the marine environment information cloud service flow are studied, and the service flow model is designed and implemented, and the standard specification of the interaction protocol is formulated. Two. On the basis of analyzing the requirements of cloud computing and the overall function of cloud services, the overall architecture of the ocean cloud platform is designed. The service flow engine is designed and implemented, which is responsible for controlling and coordinating the execution of the computing models, the analysis and reorganization of service flow, and the scheduling of service flow. Three, we designed and implemented the key algorithm PRSF of the service flow monitoring module and the service flow operation mechanism, and implemented the service flow with the highest parallel efficiency and the lowest processing overhead. Combined with the interaction interface between the front and back end of the service flow, the core of the monitoring module, the task execution schedule extractor, is realized. Four. Finally, the prototype demonstration system is built, and the service flow system under the marine environment information cloud platform is realized. The prototype demonstration system is tested by two typical applications of tidal water level and marine environment information visualization. Experimental verification of the platform and the realization of the function of the system as a whole, can service cloud platform telescopic flow task and has high advantage in processing large-scale data proved that marine cloud platform service flow system can be effective, flexible, and has high execution efficiency and service flow.
【学位授予单位】：上海大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP311.52;TP393.09

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