Services in Cloud Comuting

What is cloud computing?

• Aka cloud

• A paradigm which allows organizations to access and utilize computing resources (such as servers, storage, databases) over internet

What are the 3 main cloud service models?

• Software as a service (SaaS)

• Platform as a service (PaaS)

• Infrastructure as a service (laaS)

What is SaaS

• aka Software as a service

• Computing model where software applications are hosted managed by a third party provider and accessed by organizations through a web browser or mobile app

• Eliminates the need for organisations to install and maintain software on their own devices, making it convenient and cost-effective

What are the characteristics of SaaS?

• All inclusive: Organizations have access to the entire application suite, including updates and maintenance, without any upfront costs or ongoing maintenance.

• Scalability: SaaS applications can be easily scaled up or down to meet changing organizational needs, ensuring optimal performance and resource utilization.

• Accessibility: SaaS applications are accessible from anywhere with an internet connection, providing organizations with flexibility and mobility.

• Security: SaaS providers implement robust security measures to protect sensitive organizational data and ensure the integrity of the applications.

e.g. Canva

What is PaaS?

• aka platform as a service

• Provides a cloud-based environment for developers to build, deploy, and manage their applications

• Offers a pre-build infrastructure including operating systems, databases, middle ware, networking, and developer tools

• This frees developers from managing the underlying infrastructure

What are the characteristics of PaaS?

• DevOps-friendly: PaaS supports rapid development and deployment cycles. DevOps is a set of practices which combines software engineering (Dev) and information technology (Ops).

• Infrastructure abstraction: PaaS simplifies application management by handling OS updates, database administration, and networking configuration.

• Reduced operational costs: PaaS eliminates the need to purchase and maintain hardware and software.

e.g. Google app engine, heroku

What is IaaS

• aka Infrastructure as a service

• Provides virtualized computing resources (such as servers storage and networking) over the internet

• Gives businesses the flexibility to provision and manage their own IT infrastructure without the need to invest in physical hardware and software.

What are the characteristics of laaS?

• |aaS allows businesses to tailor their [T infrastructure to their

  specific needs and requirements.

• Scalability: Resources can be easily provisioned and scaled up or down as needed, ensuring optimal performance and cost efficiency.

• Control: Businesses have full control over the configuration and management of their laaS infrastructure

e.g. IBM cloud, Microsft Azure, Amazon Web services, Google Cloud platform