Over the years, an increasing number of services are consumed in the cloud and as architects one of the key considerations is designing the availability of a service you are looking to consume in the cloud. In Azure, you have options to use availability zones which is providing local data centre failures within a region or designing for regional failures where there is a complete region outage and you need to run the workload from another region.
Microsoft has a great set of documentation at Azure reliability documentation | Microsoft Learn covering how you would design for a local regional data centre failure and a region failure.
The page I refer to quite often is the Azure services that support availability zone. Each of the services listed provides a link to the documentation describing how you can achieve it. Azure services that support availability zones | Microsoft Learn
The second page that I also refer to often is Reliability guidance overview for Microsoft Azure products and services | Microsoft Learn which provides links for both availability zone and disaster recovery (regional failure). They are short guides explaining and providing options on how you would achieve availability for a particular Azure service.
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