The Read Aloud Cloud by Brazeal Forrest;

Author:Brazeal, Forrest; [Brazeal, Forrest]
Language: eng
Format: epub
Publisher: John Wiley & Sons, Incorporated
Published: 2020-09-16T00:00:00+00:00

Availability Zones and Regions

The natural enemy of the data center is the backhoe. Nothing can ruin a clever data backup strategy faster than a giant shovel slicing through the fiber-optic cable outside the building.

So the major cloud providers all have a concept of “availability zones,” which are groups of one or more data centers that are physically far enough apart to avoid sharing some sort of localized catastrophe like a sliced network link but close enough together that data can travel back and forth without too much latency, or communication delay. (Remember, the cloud has to obey the laws of physics, just like all of us schmucks here on the ground.)

Availability zones themselves are grouped into geographical “regions,” usually comprising two or more zones. If an entire region were to go offline, that would be a bad day. Like if a giant meteor hit the East Coast of the United States. Or, as happened to Amazon in 2017, if some system administrator typed 100 when they meant to type 10 and accidentally restarted too many servers, causing a cascading failure that took down S3 in the US-East region and what seemed like half the Internet with it.

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