It helps the application or network services remain accessible in the event of outage. The failover updates the DNS records according to services' availability.
It provides you high availability.

How works?

  • It checks the availability of services regularly by using the health checks.
  • The health checks are like the regular requests coming from clients.
  • In addition you can specify the sources of health checks. If your customers are based in Europe, you can define health checks based on European cities.
  • It updates the DNS records to another working service which is predefined IP or host when it determines an outage.
  • Simply you define a primary/secondary system.

Advantages

  • It forwards the traffic to always running system.
  • Thanks to DNS failover your customers don't face with an issue or minimal while connecting your services. So you don't lose customers.
  • You can cover the SLA as much as possible. And business happy :)

Use Cases

  • The master servers of SQL database management systems.
  • Web services for a location
  • Network services like dns, smtp, ldap.