Global Site Selector (GSS) is used for globally loadbalancing distributed data centers.
Technically its an intelligent DNS server that keep tracks of the load and availability of Hosts and resolve the domain names as per defined rules.
for example
1. If Data center in LA is down resolve the domain names to servers in NY.
2. If Servers in NY are 50% utilized then resolve domain names to UK.
GSS can also be configured to make decisions on basis of proximity
e.g
If Client is in CA then resolve the domain name to sevrers in LA. If client is in ASIA then resolve domain names to servers in Bangkok.
The main advantage is the GSS?s ability to extract load and availability information directly from Cisco Local Load balancers CSS and CSM.
Syed Iftekhar Ahmed
