What are IaaS, PaaS, Serverless and SaaS

What is Cloud Computing Model and What are IaaS, PaaS, serverless and SaaS?

  What is IaaS?

IaaS - Infrastructure as a Service :  Infrastructure as a Service provides virtual IT Infrastructure as service without investment (purchase) on servers and virtual machines (VMs), storage, networks, operating systems—from a cloud provider.

IaaS quickly scales up and down with on demand, Pay as you Go model. A cloud computing service provider, such as Azure, manages the infrastructure, while you purchase, install, configure, and manage your own software—operating systems, middleware, and applications.

IaaS -  Business Scenarios

• Test and Development ( in case of -Developers) 
•  Website Hosting ( Organization Application ERP/ Amazon, Flipkart etc) .
•  Storage, Backup and Recovery ( Data Store Outside depend on Business Requirements.
•  Web Apps ( Hosting Mobile application or Web Application.
• High-performance computing - (HPC) on supercomputers, computer grids or computer clusters helps solve complex problems involving millions of variables or calculations. Examples include earthquake and protein folding simulations, climate and weather predictions, financial modeling and evaluating product designs.
• Big data analysis. Big data is a popular term for massive data sets that contain potentially valuable patterns, trends and associations. Mining data sets to locate or tease out these hidden patterns requires a huge amount of processing power, which IaaS economically provides.

Advantages of IaaS

• Eliminates capital expense and reduces ongoing cost-  it an economical option for start-ups and businesses testing new ideas.
• Improves business continuity and disaster recovery. - Achieving high availability, business continuity and disaster recovery. Service level agreement (SLA) in place, IaaS can reduce this cost and access applications and data as usual during a disaster or outage.
• Innovate rapidly- Quick Setup during launch a new product or initiative, the necessary computing infrastructure can be ready in minutes or hours, rather than the days or weeks—and sometimes months.
• Respond quicker to shifting business conditions. IaaS enables quickly scale up and scale down resources when needed.  Scale dwon Application— during the holidays to save money and electricit.
• Focus on your core business - IaaS frees up your team to focus on your organisation’s core business rather than on IT infrastructure.