From a NetScaler perspective Global Service Load Balancing (GSLB) is used as a way to manage and control the traffic flow between two (or more) separate physical locations (data centers) that are, in most cases, geographically dispersed.
A GSLB configuration consists of a group of GSLB entities on each appliance in the configuration. These entities include GSLB sites, GSLB services, GSLB virtual servers, load balancing and/or content switching servers, and ADNS services.
A GSLB configuration consists of a group of GSLB entities on each appliance in the configuration. These entities include GSLB sites, GSLB services, GSLB virtual servers, load balancing and/or content switching servers, and ADNS services.