In meteorology there is a detailed classification of clouds, numbering at least 12 species. IT professionals do not lag behind in this regard- they can conventionally distinguish several categories of “cloud services“. It should be noted that the conventional classification generates a certain amount of confusion in concepts, so it’s important to give at least a brief description of categories.
There are three major types of cloud-based technologies: SaaS; software as a service, PaaS; Platform as a Service and IaaS: infrastructure as a service.
SaaS Model – A lease of the software, which is developed by the service provider, and the user can access it via the Internet. This model allows us to reduce the cost of implementation and maintenance of software. A striking example – popular with the U.S. system of Customer Relationship Management Salesforce.com. Paying for its services in proportion to consumption, you can use the ready business process for working with clients. This completely eliminates the need for costly implementation of the system in operation.
PaaS Model involves the provision of a platform as a service, for example, to develop or test software. Thus, any organization can get the missing computational resources for the development and subsequent operation of their own applications. Google App Engine is one of the leaders in such services.
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