High availability (HA) is a characteristic of a system that aims to ensure an agreed level of operational performance, usually uptime, for a higher than normal period.
Percentage calculation
Percentage calculation
| Availability % | Downtime per year | Downtime per quarter |
|---|---|---|
| 99.8% (“two nines eight”) | 17.53 hours | 4.38 hours |
| 99.9% (“three nines”) | 8.77 hours | 2.19 hours |
| 99.95% (“three nines five”) | 4.38 hours | 65.7 minutes |
| 99.99% (“four nines”) | 52.60 minutes | 13.15 minutes |
Anup Maurya Changed status to publish April 25, 2024
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