How Many Fault Domains and How Many Update Domains We can Have?

Question

Dhanush M P · Accepted Answer

In Azure, each Availability Set supports up to 3 fault domains and up to 20 update domains. Fault domains provide physical hardware isolation, while update domains provide logical groups for planned maintenance and updates, ensuring minimal downtime during maintenance.

Dhanush M P · Answer

Azure supports a maximum of 3 fault domains and up to 20 update domains within an availability set. Fault domains provide physical hardware isolation to protect against data center hardware failures, while update domains define groups for rolling software updates to minimize downtime.

How Many Fault Domains and How Many Update Domains We can Have?

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