IaaS

Source: Dev.to

What is IaaS?

IaaS, or Infrastructure as a Service, is a cloud computing model that provides on‑demand access to computing resources such as servers, storage, networking, and virtualization.

IaaS is attractive because acquiring computing resources the traditional way requires time and capital. Organizations must purchase equipment through procurement processes that can take months, invest in physical spaces (typically specialized rooms with power and cooling), and employ IT professionals to manage and maintain the systems after deployment.

IaaS defined

Infrastructure as a Service (IaaS) is the on‑demand availability of highly scalable computing resources as services over the internet. It eliminates the need for enterprises to procure, configure, or manage infrastructure themselves, and they only pay for what they use.

Infrastructure as a service (IaaS)

For IaaS models, the service provider hosts, maintains, and updates the backend infrastructure—compute, storage, networking, and virtualization. You manage everything else, including the operating system, middleware, data, and applications.

Platform as a service (PaaS)

Like IaaS, the service provider delivers and manages the backend infrastructure. However, PaaS also provides all the software features and tools needed for application development. You still write the code and manage your apps and data, but you do not have to worry about managing or maintaining the software development platform.

Software as a service (SaaS)

With SaaS models, the service provider delivers the entire application stack—the complete application and all the infrastructure needed to deliver it. As a customer, you simply connect to the app through the internet; the provider is responsible for everything else.

IaaS security

With IaaS models, the CSP secures the resources and hardware that support the underlying infrastructure, including compute, storage, patching, and the physical network. As a customer, you are responsible for securing your data, applications, virtual network controls, operating system, and user access.

While security is often cited as a disadvantage of IaaS and cloud computing in general, cloud is no more or less secure than on‑premises environments. In fact, it can offer more comprehensive protection against threats.

Do you need IaaS?

One of the primary reasons businesses choose IaaS is to reduce capital expenditures and transform them into operational expenses. IaaS provides storage, compute, and networking options that eliminate the need to purchase and maintain large private server rooms that consume significant energy and space.

If you have unpredictable workload volumes or need to respond swiftly to business fluctuations, IaaS can be a cost‑effective way to support your operations.

Good candidates for IaaS

Organizations that experience any of the following are good candidates for IaaS:

• High business growth that outpaces infrastructure capabilities
• Unpredictable spikes in demand for infrastructure services
• Low utilization of existing infrastructure resources
• Large volumes of data that overwhelm on‑premises data stores
• Slow response times with on‑premises applications
• Application performance limitations due to capacity constraints
• Slow hardware refresh cycles

These scenarios require more infrastructure scalability and agility than traditional data centers can provide.