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Рік заснування видання - 2011

TYPES OF CLOUD SERVICES

13.10.2021 00:02

[1. Information systems and technologies]

Author: Гончаренко Д.В., студент, комп’ютерна інженерія та управління, Харківський національний університет радіоелектроніки, м. Харків


Let's start by trying to define what a «cloud» is. In the general case, the cloud is a tool that allows the customer's IT service to solve a problem quickly, efficiently and with minimal capital costs. Every year, businesses expect IT to increase the speed of output and provide new internal and external services. 

Conventionally, all types of cloud services can be divided into three types:

• Infrastructure as a Service;

• Platform as a Service;

• Software as a Service.

As you can see, there is a prefix as a Service everywhere. This means that all types of clouds are provided on a subscription basis, i.e. they are used only when needed. The concept of Pizza-as-a-Service perfectly explains the essence of cloud services:



Fig.1 – The concept of Pizza-as-a-Service

So, let's start with the type of cloud technology, the representatives of which are best known – Software as a Service. This type implies the provision of a ready-made solution for the client with minimal need for settings. That is, theoretically, subscribing to such a service, it can be managed by any user with minimal involvement of the system administrator or without it at all. The most well-known representatives of such a service in the corporate environment are Office 365. If we talk about SMB, then it is worth mentioning such cloud services as Dropbox, Evernote, Trello and others.

PaaS services are designed primarily for developers. They represent sets of ready-made components for creating applications, as well as frameworks for platform management. In this case, the components will be database services, repositories, automated deployment tools, test environments, and the like. Examples of PaaS services are Google AppEngine, VMWare Pivotal Cloud Foundry, Red Hat's OpenShift, Heroku and more.

Finally, the closest type of service to system administrators is IaaS. Infrastructure as a service in its facilities and characteristics is closest to owning your own «hardware» and virtualization. In the case of IaaS, you get cloud processors, memory, disks, and networks, from which you later create virtual routers and configure the network topology as you need.

The logic of choosing the right type of cloud service is to find a balance between setup speed and system flexibility. It is unlikely to sharpen SaaS exactly for your business processes, but it is also almost impossible to build a ready-made solution based on IaaS in a couple of hours. It is also worth noting the need to build multi-vendor solutions, which in the case of SaaS and PaaS can be very difficult.

And it’s necessary to mention one more of the cloud models, without which the review would not be complete, namely VPS and Dedicated servers. Formally, this service also falls into the IaaS class, but has significant differences. The essence of the service consists in the provision by the customer of virtual or dedicated physical servers for rent at very low prices.

Література:

1. Виды облаков и облачных услуг [Електронний ресурс] – Режим доступу до ресурсу: https://www.datafort.ru/blog/the-types-of-clouds.htmlhttps://www.datafort.ru/blog/the-types-of-clouds.html.

2. Виды облачных сервисов: IaaS, PaaS, SaaS и другие модели [Електронний ресурс] – Режим доступу до ресурсу: https://oblako.kz/iaas-blog/samye-populjarnye-oblachnye-servisy-v-mire.



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