Cloud Computing Core Concepts

Intro

Three types of cloud services:

1. software as a service (SaaS), e.g.
   • SalesForce
   • Microsoft 365
   • Google Apps for Work
2. infrastructure as a service (IaaS), e.g.
   • AWS
   • Azure
   • Google Cloud
3. platform as a service (PaaS), e.g.
   • Google Cloud

Cloud Computing abilities:

• Leverage remote systems,
• Pay only for the resources you use,
• Scale up and back as needed.

Deployment Modes:

• Private,
• Public,
• Hybrid

Deployment Modes

Private (More secure):

• You own the hardware that the cloud runs on.
• Runs on premises.
• Costly.

Public (Elastic scaling),

• Leveraging cloud services over the internet.
• Uses hardware and software that you don’t own.
• Cheaper.

Hybrid (Seamless):

• Uses both public and private.

Types of Clouds

1. software as a service (SaaS),
   • Finished app that you rent and customize
   • Runs on web-browser, e.g.
   • CRM (customer relationship management) software
   • ERP (enterprise resource planning) software

Why SaaS Clouds?

• no hardware neither install software.
• unlimited scalability
• automatic updates
• support for desktop and mobile devices

1. infrastructure as a service (IaaS),
   • Deployment platform that abstracts infrastructure
   • Runs on data-centers
   • The provider hosts both Hardware and Sofware on behalf of the user.
   • Supports public, private, and hybrid deployment models.
2. platform as a service (PaaS),
   • Deployment platform that abstracts infrastructure
   • Reduce appplication development and deployment costs
   • Provides a platform to develop, test, run, and manage applications without building and mantaining infrastructure.