Summary

With this, you come to the end of the first session. In the next video, Siben summarises the learnings from this session.

The important points covered in this session are as follows:

• Traditionally, organisations would have physical servers and data centres on their premises. This would lead to upfront costs to buy these resources and a significant expenditure on their maintenance.

• Cloud computing means on-demand delivery of IT resources and these resources could be accessed using the internet. Nowadays, you do not need to buy and maintain any infrastructure; instead, you can just rent them whenever there is a requirement.

• Some advantages of cloud computing include reduced cost, improved performance, easy to scale, fast access to resources when required and increased productivity of the organisation. 

• The N-Tier System, also known as distributed applications, is an upgraded version of the 3-Tier System. Since the different layers of the systems are separated from each other, they are highly scalable across each layer. These systems make full use of cloud computing.

• The different service models are On-Premise, IaaS, PaaS and SaaS. In IaaS, you rent the infrastructure and all the hardware is cloud managed and you need to manage runtime, OS, application and data. In PaaS, the entire hardware, runtime and OS are cloud managed and you only need to manage data and application. In SaaS, all the resources are cloud managed.

• The different deployment models are Private Cloud, Public Cloud, Hybrid Cloud and Multi-Cloud. Private Cloud is owned completely by a single organisation similar to the on-premise service model. In Public Cloud, the entire cloud services are owned by the cloud service providers. Hybrid Cloud is a mix of both private cloud and public cloud. In Multi-Cloud, organisations use multiple cloud providers to provide different services.

• AWS, Microsoft Azure and GCP are the major cloud providers. AWS has a market share of 33%, followed by Microsoft Azure with 18% and GCP with 8%. 

The PPT used in this session is attached below.