Types of Cloud Services

SaaS

Software as a Service

Cloud-based service providers offer end-user applications. Google Apps, DropBox, Slack, etc.

• Web access to Software (primarily commercial).
• Software is managed from a central location.
• Delivery 1 - many models.
• No patches, No upgrades

When not to use

• Hardware integration is needed. (Price Scanner)
• Faster processing is required.
• Cannot host data outside the premise.

PaaS

Platform as a Service

Software tools are available over the internet. AWS RDS, Heroku, Salesforce

• Scalable
• Built on Virtualization Technology
• No User needed to maintain software. (DB upgrades, patches by cloud team)

When not to use PaaS

• Propriety tools don't allow moving to diff providers. (AWS-specific tools)
• Using new software that is not part of the PaaS toolset.

IaaS

Infrastructure as a Service

Cloud-based hardware services. Pay-as-you-go services for Storage, Networking, and Servers.

Amazon EC2, Google Compute Engine, S3.

• Highly flexible and scalable.
• Accessible by more than one user.
• Cost-effective (if used right).

Serverless computing

Focuses on building apps without spending time managing servers/infrastructure.

Feature automatic scaling, built-in high availability, and pay-per-use.

Use of resources when a specific function or event occurs.

Cloud providers handle the deployment, and capacity, and manage the servers.

Example: AWS Lambda, AWS Step Functions.

Easy way to remember SaaS, PaaS, IaaS