ZXTM Global Load Balancer User Guide
ZXTM Global Load Balancer is a powerful, easy to use Global Server Load Balancing solution. It provides business continuity and improved performance by enabling failover and load balancing across globally-distributed datacenters. It is easy to deploy and gives rich feedback on site performance and traffic distribution.
Global Server Load Balancing (GSLB) is a technique that manages how clients are connected to a datacenter when a service is hosted in multiple datacenters.
• In an Active-Passive configuration, one datacenter is nominated the active one for each service. The other datacenters are idle for that service. If the active datacenter becomes unavailable, one of the passive datacenters becomes active and all clients are directed to it.
• In an Active-Active configuration, all datacenters are used and clients are load-balanced between them based on datacenter performance and proximity.
The primary purpose of a GSLB system is Business Continuity - to ensure that services are always available, even when one or more service locations (datacenters) becomes unavailable.
A second purpose of GSLB is to Improve Customer Experience - to load-balance each user to the best datacenter from a choice of several. The choice can be based on datacenter performance and proximity, so that clients are directed to the datacenter that is closest and is performing the best. This way, the client gets the best possible level of service.
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