High-Availability

Redundancy for the Director role is provided in a similar fashion as with Front End servers and requires just adding more Directors to a pool. Also as with a Front End pool, up to 12 servers can be defined in a Director pool. Load balancing is achieved via the same methods as Front End servers by providing multiple IP addresses that resolve to the pool name of the Directors. If one IP address is unavailable, the endpoint will attempt to log in to another IP address provided for the pool in DNS.

Tip

Plan for high-availability in the environment from the start even if multiple Directors will not be deployed initially. Completing the planning and configuration for high-availability simplifies the deployment later and requires nearly no changes to the existing infrastructure. Adding high-availability to the environment later simply becomes a matter of adding a new server to the topology, creating the DNS records, and potentially adding a pool member to a load balancer.

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