基于NGPD的PaaS平台研究与实现*

云计算是一种将计算和存储任务分配到由大量计算机构成的云中的计算模式。云计算提供三种类型的服务：基础设施即服务（IaaS）、平台即服务(PaaS)和软件即服务(SaaS)。虽然PaaS在云系统中起到了关键的作用，但是目前的PaaS平台存在着服务协同性低、资源匮乏、用户界面不友好等问题。本文设计并实现了基于准则调控和策略驱动的自治式服务协同模型（NGPD）的PaaS平台，其利用自治计算元素实现了自治式服务协同，这是尝试解决现有PaaS平台支持提供云平台型服务不足的探索性研究，为云用户提供了更加高效和经济的平台开发环境。

Research and implementation of PaaS platform based on norm-governed and policy-driven autonomic model

Cloud computing is a computing paradigm that it assigns the computing and storing task to the cloud which is composed by a large number of computers.Cloud computing provides three types of services:infrastructure as a service,platform as a service and software as a service.While PaaS in cloud system plays a key role,there is now PaaS platform for low service coordination,lack of resources,unfriendly user interface and other issues.This paper designed and implemented PaaS platforms based on norm-governed and...