Preventing Business Logic Tier Failures

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You can make the business logic tier more resilient by using load-balanced Web clusters to protect servers, services, and the network against failures. Load-balanced clusters enable you to remove an unresponsive server from the cluster so that users will not be directed to a faulty server, and the unresponsive server can be repaired. You can combine Round Robin Domain Naming System (RRDNS) with load balancing to produce a scalable and available configuration.

All the nodes in a load-balanced cluster must be on the same LAN subnet and all the nodes should refer to the same IP address. On a site with multiple Web clusters, you must configure multiple load-balanced clusters on different subnets and configure the Domain Name System (DNS) to sequentially distribute requests across multiple load-balanced clusters to increase scalability.

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