What is the significance of "99.99%" (four nines) availability in an SLA, and roughly how much downtime does it allow per year?

Question

Thamimul ansari · Accepted Answer

A "four nines" ($99.99\%$) availability SLA guarantees near-constant uptime, meaning approximately 52.56 minutes or about 4.32 minutes per month of total downtime annually. This level of availability is critical for businesses where even small disruptions can have significant financial or operational consequences, such as e-commerce, financial services, and healthcare

What is the significance of "99.99%" (four nines) availability in an SLA, and roughly how much downtime does it allow per year?

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