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Availability Zone Disruption

Availability Zones (AZs) are nothing but data centers within a region. For example, North Virginia has the maximum of 6 AZs. An AZ is geographically separated from another AZ. Suppose a natural calamity, like earthquake occurs, in the region of an AZ, say 1A, the entire AZ will not be available. This is called Availability Zone Disruption.

In such cases, we should make our applications highly available by scaling them across other AZs. Minimum good number of AZs is 2.

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