下面这些术语是什么意思?
SaaS PaaS IaaS吗?
现在有各种各样的云服务，比如亚马逊的EC2和AWS、Apache Hadoop、微软Azure和许多其他云服务。它们分别属于哪一类，为什么?
当前回答
SaaS |
PaaS |
Iaas |
|---|---|---|
| Software-as-a-Service | Platform-as-a-Service | Infrastructure-as-a-Service |
| Ready to use infrastructure and software application that are centrally hosted and licensed on a subscription basis. | Ready to use environment. where customers build, test, run, and update apps quickly and inexpensively. | Provides on-demand access to physical computing resources, such as servers, storage, networking, and data center space without need to manage or operate. |
| Apps can be accessed over the internet on any device with a browser. | Cloud provider manages the entire platform. | Users can provision, test, and scale resources quickly. |
| Easy to add additional users and storage. | Additional compute, storage, and networking capacity can be purchased quickly and used immediately. | NA |
| Use Cases: Most personal or employee productivity applications (email, document management, online collaboration tools) | Use Cases: Migration of existing applications to the cloud, a hybrid cloud strategy | Use Cases: Backup/recovery of on-premises workloads, dev and test environments, customer facing websites, data storage and analytics |
其他回答
IaaS、PaaS和SaaS基本上都是云计算领域。
IaaS(基础设施即服务)——基础设施即服务是云计算的一种提供模型，在这种模型中，组织将用于支持运营的设备外包，包括存储、硬件、服务器和网络组件。服务提供商拥有设备，并负责设备的安装、运行和维护。客户通常按使用次数付费。前亚马逊网络服务，BlueLock, Cloudscaling和Datapipe
PaaS (Platform as a Service) - Platform as a Service is one of the GROWING sector of cloud computing. PaaS basically help developer to speed the development of app, saving money and most important innovating their applications and business instead of setting up configurations and managing things like servers and databases. In one line I can say Platform as a service (PaaS) automates the configuration, deployment and ongoing management of applications in the cloud. Ex: Heroku, EngineYard, App42 PaaS and OpenShift
SaaS(软件即服务)——软件即服务，SaaS是一种软件交付方法，它以基于web的服务的形式提供对软件及其功能的远程访问。阿比柯和阿卡迈
我知道这个问题已经回答了一段时间，但这可能会有所帮助。
下面这些术语是什么意思? SaaS
软件即服务——从本质上讲，任何使用云中的内容运行的应用程序都被称为软件即服务，只要您不拥有它。
例如Gmail, Netflix, OneDrive等。
最终用户，每个人
IaaS
基础设施即服务意味着提供商允许其计算能力的一部分给其客户，它是由计算能力的效力购买的，并捆绑在虚拟机中。像谷歌云平台、AWS、阿里云这样的公司可以被称为IaaS提供商，因为他们以虚拟机的形式向用户出售处理能力(服务器、存储、网络)。
听众:IT专业人士，系统管理员
PaaS
平台即服务更像是IaaS和SaaS之间的中间人，客户不必处理服务器、网络和存储的细节，PaaS提供商可以随时提供一切。基本上，初始化开发环境是为了使构建应用程序更容易。
例如Heroku, AWS Elastic Beanstalk，谷歌App Engine等
听众:软件开发人员。
现在有各种各样的云服务，比如亚马逊的云服务 EC2和AWS, Apache Hadoop，微软Azure和许多其他。哪一个 每一个都属于什么类别，为什么?
Amazon EC2和AWS是一种基础设施即服务，因为您需要系统管理员来管理操作系统的工作流程。通常情况下，构建一个功能齐全的应用并不需要抽象。微软Azure也属于上述指导方针的范畴。
我真的没有使用过Apache Hadoop，所以我真的不能说。
有三种主要类型的云服务:IaaS、PaaS和SaaS。您可能在云提供商的网站上看到过这些缩写。在讨论细节之前，让我们先比较一下IaaS、PaaS和SaaS与传输的关系:
On-premises IT infrastructure is like owning a car. When you buy a car, you’re responsible for its maintenance, and upgrading means buying a new car. IaaS is like leasing a car. When you lease a car, you choose the car you want and drive it wherever you wish, but the car isn’t yours. Want an upgrade? Just lease a different car! PaaS is like taking a taxi. You don’t drive a taxi yourself, but simply tell the driver where you need to go and relax in the back seat. SaaS is like going by bus. Buses have assigned routes, and you share the ride with other passengers.
参考:https://rubygarage.org/blog/iaas-vs-paas-vs-saas
对于傻瓜:
IAAS(基础设施即服务):
基础层 处理虚拟机，存储(硬盘)，服务器，网络，负载均衡器等
PAAS(平台即服务):
IAAS之上的一层 运行时(如java运行时)，数据库(如mySql, Oracle)， Web服务器(tomcat等)
软件即服务(SAAS):
PAAS上的一个层 应用程序，如电子邮件(Gmail，雅虎邮件等)，社交网站(Facebook等)
为了快速关联，考虑以下谷歌的产品:
IAAS: 谷歌计算引擎(可以开发在高性能谷歌计算基础设施上运行的程序)
PAAS: 谷歌应用程序引擎(一个可以开发应用程序，让他们在谷歌应用程序引擎上执行，它负责执行)
SAAS: Gmail，谷歌+等(可以使用电子邮件服务，并扩展基于电子邮件/谷歌+的应用程序，以形成更新的应用程序)
受欢迎程度
公司明智的知名度
云计算是由
亚马逊网络服务(AWS) 谷歌计算引擎，谷歌应用引擎 微软Azure 有许多中小型云运营商，包括IBM、甲骨文等。
这些服务的受欢迎程度主要归功于公司的声誉以及这些公司在云空间方面的投资。
服务类型明智的知名度
PAAS (Platform as a Service) is more popular among developers as they can put all their concentration on developing their apps and leave the rest of management and execution to the service provider. Many service providers also offer the flexibility to increase/decrease the CPU power depending upon the traffic loads giving developers cost effective and easy & effortless management. SAAS (Software as a service) is more popular among with consumers, who bother about using the application such as email, social networking etc IAAS (Infrastructure as a service) is more popular among users into research and high computing areas.
