Service Level Agreement (SLA)

wikipedia:Service Level Agreement

https://en.wikipedia.org/wiki/High_availability#Percentage_calculation

• 99.9% (one nine)

Daily: 1m 26s
Weekly: 10m 4s
Monthly: 43m 49s
Yearly: 8h 45m 56s

• 99,95% (RDS MultiAZ)

Daily: 43s
Weekly: 5m 2s
Monthly: 21m 54s
Quarterly: 1h 5m 44s
Yearly: 4h 22m 58s

• 99.99% (two nines)

Daily: 8s
Weekly: 1m 0s
Monthly: 4m 22s
Yearly: 52m 35s

• 99.999% (three nines): Google Cloud Spanner

Daily: 0s
Weekly: 6s
Monthly: 26s
Yearly: 5m 15s

• SLA Management Monitoring Tools

Related terms

• AWS SLAs: https://aws.amazon.com/legal/service-level-agreements/
• Single-AZ

See also

• ITSM, ITIL, SLA, SLO, SLI, Operational-level agreement (OLA), Customer Support Portal (CSP), MTTR, AWS SLAs, Error budget
• Service health dashboard