How can high availability be configured in ArcGIS Enterprise?

High availability in ArcGIS Enterprise is achieved through the configuration of multiple servers in an active-active or active-passive arrangement. This setup ensures that if one server fails or is down for maintenance, another server can continue to handle requests and data processing without interruption. An active-active configuration allows multiple servers to work simultaneously to distribute the load, while an active-passive configuration has one server active and another on standby, ready to take over if the active server fails.

This redundancy is crucial for maintaining service continuity and minimizing downtime, especially in environments where uninterrupted access to GIS services is critical. Properly setting up high availability supports load balancing, enhances performance, and improves user experience by ensuring that applications remain accessible even during issues with a single server.

Other options focus on approaches that, while useful in various contexts, do not address the fundamental principles of high availability specifically within ArcGIS Enterprise. For example, a single-server architecture does not provide redundancy or failover capability. Restricting user access to off-peak hours might manage usage but does not enhance availability during peak times. Third-party backup solutions, while important for data protection, are not a direct mechanism for ensuring high availability of the services themselves.