Cloud Concepts

Cloud Computing Models

• Public cloud
• Private cloud
• Hybrid cloud

Cloud Service Models

• IaaS - Infrastructure as a service
• SaaS - Software as a service
• PaaS - Platform as a service
• DaaS - Database as a service
• DaaS - Desktop as a service
• WaaS - Workstation as a service

Scaling

• Scale Vertical (Scale Up) - Add more recources to one machine (more CPU, memory, etc).
• Scale Horizental (Scale Out) - Add more machines.
• Elastic scaling - Scale up or scale out based on the load.
• Resiliency - Recover from failure, disaster or high availability.