转载http://blog.chinaunix.net/uid-22414998-id-3141499.html 定义 云计算主要分为三种服务模式,而且这个三层的分法重要是从用户体验的角度出发的: SaaS:Software as a Service,软件即服务,这层的作用是将应用作为服务提供给客户. PaaS:Platform as a Service,平台即服务,这层的作用是将开发平台作为服务提供给用户. IaaS:Infrastructure as a Service,基础设施即服务,这层
云计算的服务模式仍在不断进化,但业界普遍接受将云计算按照服务的提供方式划分为三个大类:SaaS(Software as a Service–软件即服务) PaaS(Platform as a Service–平台即服务) IaaS(Infrastructure as a Service–基础架构即服务) PaaS基于IaaS实现,SaaS的服务层次又在PaaS之上,三者分别面对不同的需求. 1.IaaS: Infrastructure-as-a-Service(基础设施即服务) 第一层叫做Iaa
越来越多的软件,开始采用云服务. 云服务只是一个统称,可以分成三大类. IaaS:基础设施服务,Infrastructure-as-a-service PaaS:平台服务,Platform-as-a-service SaaS:软件服务,Software-as-a-service 它们有什么区别呢? IBM 的软件架构师 Albert Barron 曾经使用披萨作为比喻,解释这个问题.David Ng 进一步引申,让它变得更准确易懂. 请设想你是一个餐饮业者,打算做披萨生意. 你可以从头到尾,自己
云计算的服务模式仍在不断进化,但业界普遍接受将云计算按照服务的提供方式划分为三个大类: SaaS(Software as a Service–软件即服务) PaaS(Platform as a Service–平台即服务) IaaS(Infrastructure as a Service–基础架构即服务). PaaS基于IaaS实现,SaaS的服务层次又在PaaS之上,三者分别面对不同的需求. 1.IaaS: Infrastructure-as-a-Service(基础设施即服务) 第一层叫做I
The other day, I arrived at the SAP LABS CHINA for interview with my pleasure. That gave me a chance to know the concept of cloud computing. We have a communication in English a few minutes , it's stimulating. And I get a point of view That English
云计算SPI(SaaS.PaaS.IaaS) The other day, I arrived at the SAP LABS CHINA for interview with my pleasure. That gave me a chance to know the concept of cloud computing. We have a communication in English a few minutes , it's stimulating. And I get a poin
先上个图,直观的了解一下 云计算有SPI,即SaaS.PaaS和IaaS三大服务模式. PaaS和IaaS源于SaaS SaaS Software as a Service 软件即服务,提供给客户的服务是应用程序 PaaS Platform as a Service 平台即服务,提供给客户的服务是软件研发平台,即客户能够在上面部署自己的应用程序 IaaS Infrastructure as a Service 基础设施即服务,提供给客户的服务是基础设施,如:云存储