How to quickly restore site availability for users in case of hosting failure?

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k_ula_k2021-06-08 18:39:29

Domain Name System

k_ula_k, 2021-06-08 18:39:29

How to quickly restore the availability of the site for users in case of hosting failure, there is a mirror of the site on another hosting. At the same time, DNS servers are placed in the third place for me and work properly. How long will it take for the new settings to be available to a regular user?

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Rsa97, 2021-06-08
@Rsa97

See the TTL parameter for your site's A-records. This is the lifetime of an entry in the DNS cache. Theoretically, this is the maximum time that the site name will be associated with the old IP address. In practice, there are crookedly configured servers that ignore the specified TTL and store records for several days.

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hint000, 2021-06-08
@hint000

Read the answer and the comments to the answer here:
How does Geolocation Route 53 and DNS caching behave when the server IP address changes?