Home > Storage > ObjectScale and ECS > Industry Solutions and Verticals > Scale Quickly and Efficiently with Dell ECS and Vertica Analytical Database > Introduction—GSLB configuration example
In environments where a single appliance cannot deliver the necessary throughput or transactions per second, clustering can be used to scale the load balancers. The most effective way to accomplish this level of scale is to deploy the load balancers in a Global Server Load Balancer (GSLB) cluster (sometimes referred to as a GEO cluster). This approach scales linearly when more load balancers are added to the cluster, with combined resources delivering the required performance.
GSLB clustering uses DNS to distribute traffic across the load balancers. As clients and other systems attempt a connection to the published application, DNS delegation is used to direct the resolution of the Fully Qualified Domain Name (FQDN) to GSLB on the load balancers. GSLB returns an IP address to the client based on the scheduling method defined in the configuration, providing proper and efficient distribution across the cluster, thus using each node in each ECS VDC.