aaS are as-a-service (i.e. service) means.
IaaS: Infrastructure-as-a- Service ( Infrastructure as a Service)
The first layer is called IaaS, sometimes called Hardware-as-a-Service.
PaaS: Platform-as-a- Service ( Platform as a Service)
The second layer is called PaaS, sometimes also known as middleware. You all development can be carried out at this level, saving time and resources. PaaS company offers a variety of online solutions for developing and distributing applications, such as virtual servers and operating systems. This saves you the cost of the hardware, but also to cooperation between the dispersed studio easier. Web application management, application design, application hosting, storage, security, collaboration and application development tools.
SaaS: Software-as-a- Service ( software as a service) The third layer is the so-called SaaS. This layer is a layer in contact with your life every day, mostly to access via a web browser. Any application on a remote server can be run over the network, it is a SaaS.
Your consumer services such as Netflix entirely from the web, MOG, Google Apps, Box.net, Dropbox or Apple's iCloud there into these categories. Although these web services are used for business and pleasure or both, but it can be considered part of cloud technology.
The difference is the different services provided by the three. PaaS and IaaS from SaaS concept. PaaS and IaaS directly through the SOA / Web Services platform to provide services to users, SaaS model can also be used as indirect support platform services to end users.
1, SaaS: to provide customers with service operators to run the application on a cloud computing infrastructure, users can search through the client interface to access, such as the browser on a variety of devices.
2, PaaS: the service provided to the consumer is the customer using development languages and tools developed or acquired applications deployed to provide cloud infrastructure providers up.
3., IaaS: the service is available to consumers for the use of all facilities, including processing, storage, networks and other fundamental computing resources, users can deploy and run arbitrary software, including operating systems and applications.
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[usage] IaaS
public and private. Amazon EC2 using a common pool of servers in the cloud infrastructure. More privatized services will use a common set of server pools or private enterprise data centers. If the development in the enterprise data center environment software, both types can be used, and use of temporary expansion of resources EC2 cost is very low - say tests. Use a combination of both can develop applications and services more quickly, shortening development and testing cycles.
[PaaS] The main features of
PaaS can integrate various existing operational capacity, can be classified as a specific application server, ability to access business, the business engine, business open platform, down based on business needs the ability to measure basic services capabilities, through IaaS API calls provided by the hardware resources, up to provide operational control center services, real-time monitoring platform, a variety of resources and these resources through the API open to SaaS users.
The main function of [SaaS]
SaaS provider for enterprises to build all the infrastructure and network software, hardware, operating platform of information required, and is responsible for all the early implementation, post-maintenance and other services, enterprises need to purchase hardware and software, building a room, recruitment of IT staff, you can use the information system via the Internet.
