Load-balancing clusters dispatch network service requests to multiple cluster nodes to balance the request load among the cluster nodes.
Load balancing provides cost-effective scalability because you can match the number of nodes ACCORDING to load requirements. If a node in a load-balancing cluster becomes inoperative, the load-balancing software detects the FAILURE and REDIRECTS requests to other cluster nodes.
Node failures in a load-balancing cluster are not visible from clients outside the cluster.
Load balancing is available with the Load BALANCER Add-On.