The Global Server Load Balance (GSLB) is a DNS-based solution that allows you to deploy redundant resources around the globe that can be leveraged to keep your business online when a local area deployment experiences unexpected spikes or downtime.
The GSLB objects are designed by the physical and logical components on the network.
The objects data center, server and location are the physical components on the network. The objects pool and FQDN are the logical components on the network.
The object data center maps to the physical data center, the object server maps to physical devices such as the FortiADC. The location is a group of geographic locations. The object pool maps to a set of virtual servers. The object FQDN will map a fully-qualified domain name to a set of virtual servers.
Below is an example of a GSLB deployment.