A clustered Orchestrator is a set of nodes that appear and act as a single Orchestrator and use a shared library. You can cluster any CA Process Automation Orchestrator for high availability, fault tolerance, and scalability.
A load balancer, such as the Apache HTTP Server, is required for clustering any Orchestrator, including the Domain Orchestrator. A load balancer is not part of the CA Process Automation installation.
While the load balancer can be configured on the same host as one of the Orchestrator nodes, it is more typical for the load balancer to reside on a separate host.
A load balancer is only required for an Orchestrator in a clustered configuration and in specific Single Sign On (SSO) configurations.
Important! If an Orchestrator is installed without first installing and configuring a load balancer, you cannot cluster that Orchestrator later.
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