Availability
Learn about availability, how to measure it, and its importance.
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What is availability?
Availability is the percentage of time that some service or infrastructure is accessible to clients and is operated upon under normal conditions. For example, if a service has 100% availability, it means that the said service functions and responds as intended (operates normally) all the time.
Measuring availability
Mathematically, availability, A, is a ratio. The higher the A value, the better. We can also write this up as a formula:
A (in percent) = ...