Benefits in migrating to the cloud - Paiet/Tech-Journal-for-Everything GitHub Wiki

High availability
- Characteristic of a system, which aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period
Service Level Agreement (SLA)
- Guarantees a certain level of availability as a percentage
Common reasons for loss of availability
- Network outage
- Application failure
- System outage
- Power outage
- Reliant system outage
Benefits of using the cloud
- Network outage
  - Cloud providers invest heavily in network infrastructure
  - Redundancy
- Application failure
  - Tools to monitor and troubleshoot apps
  - Sandboxing to test apps
  - Ability to roll back
- System outage
  - System running application fails
  - Physical or virtual
  - Cloud provider monitors VM health
  - Offer means to recover VMs
- Power outage
  - Cloud providers invest in redundant power systems
  - Can move application to another region for wide-spread outages
- Reliant system outage
  - Application may rely on systems not in the cloud
  - Failure of these systems causes app failure
  - Cloud provides troubleshooting, alerts, and diagnostic tools