In a distributed database setup across more than two data centers, what will happen if the primary database server fails due to a spike in incoming requests?

$$ The primary database server will reboot.

$$ A new database server will be created automatically and replace the primary server.

$$The IP address of the primary database server is switched to the secondary database server.

$$ The DNS canonical name record is changed to point to the secondary server.

$$ The secondary database server will be renamed to the primary database server.