What is Availability Zone?
An independent data centre within a cloud region, isolated from failures in other zones.
Why It Matters
Spreading your app across multiple availability zones protects it from outages caused by a single data centre failure.
Real-World Example
Running servers in three availability zones in Sydney so if one data centre has an issue, the others keep your app running.
“Understanding terms like Availability Zone matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”
Related Terms
Region (Cloud)
A geographic area containing one or more data centres where cloud providers host their services.
Disaster Recovery
Plans and systems for restoring operations after major failures
Uptime
The percentage of time your application is available and working
Cloud Computing
Using remote servers over the internet instead of your own computers
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Related Terms
Uptime
The percentage of time your application is available and working
Disaster Recovery
Plans and systems for restoring operations after major failures
Cloud Computing
Using remote servers over the internet instead of your own computers
Region (Cloud)
A geographic area containing one or more data centres where cloud providers host their services.
Server
A computer that runs continuously to handle requests, store data, and serve your application to users
Serverless
A way to run code without managing your own servers, where the cloud provider handles everything